Roger Todd Water Heater Improvement
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong><br />
<strong>Roger</strong> <strong>Todd</strong><br />
1518 W. Northfield Blvd. 37129<br />
615-869-8389<br />
<strong>Roger</strong>Wilson<strong>Todd</strong>@gmail.com<br />
Summary:<br />
PLUMBING:<br />
1. <strong>Water</strong> <strong>Heater</strong>: 50 gal. tank gas water heater near middle of garage south wall will be<br />
replaced with Rinnai tankless gas water heater installed on wall space left of tank.<br />
A. Venting: Air intake and exhaust will be 2/4 concentric polypropylene vent through<br />
existing B-vent path up through attic into roof-mounted vertical termination<br />
extending to same height as current B-vent.<br />
B. Condensate: Condensate drain path will be through wall into crawlspace and<br />
sloped east to exterior south wall penetration with freeze prevention.<br />
C. Pipe Cover: Tankless water heater will use pipe cover so only exposed components<br />
are: 1) vent at top and 2) pressure release pipe at bottom.<br />
D. Recirc Line: Dedicated hot water return line will be installed from tankless unit<br />
through crawlspace and up to master bath, right-side sink.<br />
E. Wireless Recirc Control: Wireless Control-R module and Wireless Push Button will<br />
be installed to manage recirculation schedule.<br />
F. Wired Recirc Control: Solid, 22 gauge, 2-wire control unit cable will be installed,<br />
electrically disconnected, from tankless unit and dead-end, coiled and hung in<br />
crawlspace, in case, someday, choice is made to add wired control unit.<br />
G. Removal: Tank and gas pipe previously serving tank will be removed.<br />
2. <strong>Water</strong> Supply Management: Space between water pipes left behind by tank water<br />
heater will be converted to cold water supply management as described below.<br />
A. In Garage: Components will be 1) electronic, whole-house shut-off valve, 2) check<br />
valve, 3) pressure regulation valve with gauge, and 4) expansion tank.<br />
B. In Crawlspace: Pipes will be reconfigured so city water supply passes through -<br />
whole house shut-off valve prior to serving any indoor or outdoor fixture.<br />
ELECTRICAL:<br />
3. Duplex Outlet: Outlet with integrated surge suppression on shared, 15A, GFCIprotected<br />
circuit at location designated by plumber within Rinnai pipe cover and for<br />
use by tankless water heater and electronic shut-off valve will be added.<br />
Page 1 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Garage Diagrams:<br />
BEFORE<br />
Vent<br />
<strong>Water</strong><br />
Gas<br />
Stand<br />
AFTER<br />
2/4 Vent<br />
<strong>Water</strong> <strong>Heater</strong><br />
Cover<br />
Shut-Off<br />
Chk Valve<br />
PRV w Gauge<br />
Exp. Tank<br />
PR<br />
Tank, gas<br />
removed<br />
Page 2 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Pipe Diagrams:<br />
BEFORE (hot water pipes in crawlspace are insulated with foam)<br />
North<br />
AFTER (hot and recirc water pipes in crawlspace are insulated with foam)<br />
North<br />
Page 3 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Cold <strong>Water</strong> Management Plumbing<br />
1. Cold water enters on RIGHT side.<br />
2. <strong>Water</strong> travels through leakSMART shut-off valve.<br />
3. <strong>Water</strong> turns 90 degrees (horizontal to ground) where it enters check valve.<br />
4. <strong>Water</strong> then enters pressure regulation valve with gauge connected by 90 degree<br />
adapter on side nearest wall.<br />
5. <strong>Water</strong> turns 90 degress (horizontal to ground) where it tees to expansion tank<br />
mounted vertically upward.<br />
6. <strong>Water</strong> re-enters wall on LEFT side.<br />
7. Note that shut-off valve buttons are accessible and gauge is readable from side.<br />
5<br />
5<br />
4<br />
7<br />
7<br />
Front<br />
3<br />
Side<br />
3<br />
2<br />
4<br />
5<br />
1<br />
Above<br />
Below<br />
6<br />
Page 4 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
<strong>Water</strong> <strong>Heater</strong> Plumbing – Front Side<br />
1. Electrical outlet is as low as pipe cover allows and as west as wall stud allows.<br />
2. Recirc wall penetration is as low as pipe cover allows and in line with unit cold connection.<br />
3. Cold wall penetration is low enough to accommodate cold connection components, high<br />
enough to accommodate recirc components, and in line with unit cold connection.<br />
4. Gas wall penetration is immediately east of electrical junction box, immediately below cold<br />
water wall penetration, and high enough that drip leg does not obstruct other components.<br />
5. Hot wall penetration is about 0.5 inches west of wall stud and at height that accommodates<br />
hot connection components, does not obstruct other components, and has aesthetic order.<br />
6. Condensate Drain wall penetration is about 025 inches east of wall stud in small, adjoining<br />
stud bay and at a height that accommodates drain connection components, does not<br />
obstruct other components, and has aesthetic order. Some rotation of pipe will be required<br />
to reach unit’s condensate drain connection.<br />
7. Unit Control Cable is secured between unit and gas wall penetration where it should be small<br />
enough to pass through into the stud bay.<br />
8. Pressure Relief Valve pipe comes down from unit’s connection to height of cold water wall<br />
penetration, where it turns 90 degrees toward wall while also rotating slightly<br />
counterclockwise to leave other components uncrowded and unobstructed. Upon reaching<br />
wall, pipe turns 90 degrees downward, bending slightly around base molding, and<br />
terminating 2 inches above garage floor. Clamps secure and support pipe on wall.<br />
8<br />
3<br />
7<br />
4<br />
6<br />
5<br />
2<br />
1<br />
Page 5 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
<strong>Water</strong> <strong>Heater</strong> Plumbing – Back Side<br />
1. Electrical outlet behind-the-wall cable penetration is via west stud at height of junction box<br />
bottom.<br />
2. Recirc behind-the-wall pipe penetration is via base plate directly behind/beneath wall<br />
penetration.<br />
3. Cold behind-the-wall pipe penetration is via west stud teeing into output of cold water<br />
management plumbing.<br />
4. Gas behind-the-wall pipe penetration is via base plate directly behind/beneath wall<br />
penetration.<br />
5. Hot behind-the-wall pipe penetration is via base plate directly behind/beneath wall<br />
penetration.<br />
6. Condensate Drain behind-the-wall pipe penetration is via base plate directly behind/beneath<br />
wall penetration.<br />
7. Unit Control Cable is small enough that its cable path should utilize gas pipe base plate<br />
penetration.<br />
8. NOTE: Oven 240V Electrical Cable is present almost directly behind a stud and comes up<br />
through kitchen floor. Care should be taken when drilling holes through base plate.<br />
3<br />
1<br />
4<br />
7 2 5<br />
8<br />
6<br />
View from Kitchen to Back Side of Garage Drywall<br />
Page 6 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
3<br />
1<br />
4<br />
7<br />
2<br />
5<br />
6<br />
8<br />
View from Crawlspace Below Kitchen Looking Up at Subfloor<br />
Page 7 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Vent Path<br />
Roof Discharge<br />
with Extension Kit to ensure termination<br />
matches current vent’s height above roof plane.<br />
Total vent path is<br />
~ 56 equivalent feet.<br />
ATTIC<br />
Roof Flashing for 9.75 pitch<br />
Vent Clamp<br />
Qty=2 39” Extensions<br />
Properly supported and secured<br />
Qty=2 45 Elbow Pairs<br />
Qty=2 Vent Clamps<br />
Qty=4 39” Extensions<br />
Properly supported and secured<br />
2 ND FLOOR<br />
White Wall Plate<br />
At garage ceiling<br />
Shortened<br />
19.5” Extension<br />
Sloped 1.2 deg.<br />
Horizontal Starter<br />
Vent Clamp<br />
90 Elbow<br />
GARAGE<br />
Page 8 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Floor 1 and Floor 2 Overlay – FYI<br />
Garage<br />
North<br />
<strong>Water</strong><br />
<strong>Heater</strong><br />
Exterior<br />
south wall<br />
condensate<br />
drain<br />
penetration<br />
Kitchen<br />
Master<br />
Bath<br />
Right-<br />
Side<br />
Sink<br />
Vertical<br />
path up<br />
common<br />
wall is<br />
8’5” to<br />
8’6” off<br />
south<br />
wall<br />
base<br />
molding<br />
Page 9 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Materials of Note:<br />
Item Mfr Model Description Qty Source<br />
01 Rinnai RUR199iN 11 Max GPM Sensei Condensing<br />
Indoor Natural Gas Tankless <strong>Water</strong><br />
<strong>Heater</strong> with Recirculation<br />
Unit<br />
Cost<br />
Cost<br />
1 kbauthority $1899 $1899<br />
02 Rinnai PCD07-SM Pipe Cover Enclosure 1 kbauthority $90 $90<br />
03 Rinnai PCD07-SM- Pipe Cover Enclosure Bottom Plate 1 kbauthority $25 $25<br />
BP<br />
04 Rinnai RWM101 Control-R WiFi Module 1 kbauthority $100 $100<br />
05 Rinnai RWMPB01 Control-R Wireless Push Button 1 kbauthority $50 $50<br />
06 Rinnai 229253NPP 2/4 Condensing Hor. Starter 1 kbauthority $20 $20<br />
Adapter<br />
07 Rinnai 229230NPP 2/4 Condensing 90 Degree Elbow 1 kbauthority $18 $18<br />
08 Rinnai 229205NPP 2/4 Condensing 45 Degree Elbow 2 kbauthority $25 $50<br />
Pair<br />
09 Rinnai 229309NPP 2/4 Condensing Vent Pipe Ext., 1 kbauthority $20 $20<br />
19.5”<br />
10 Rinnai 229310NPP 2/4 Condensing Vent Pipe Ext., 39” 6 kbauthority $23 $141<br />
11 Rinnai 710265 2/4 Rubber Wall Plate, White 1 kbauthority $3 $3<br />
12 Rinnai 224356NPP 2/4 Condensing Roof Discharge 1 kbauthority $45 $45<br />
Termination 20” above Roof<br />
13 Rinnai 189951 6/12 to 12/12 Roof Flashing 1 kbauthority $46 $46<br />
14 Rinnai 224042 Universal Bug Guard II 1 Build.com $80 $80<br />
15 leakSMART 8881000 <strong>Water</strong> Leak Detection Starter Kit 1 Amazon $466 $466<br />
3/4” Valve, Sensor, and Hub<br />
16 leakSMART 8850700 Range Extender 1 Amazon $109 $109<br />
17 Best<br />
22-2SD-100 100' ft 22 Gauge 2 Conductor Solid 1 Amazon $13 $13<br />
Connections White Security Alarm Wire Cable White<br />
18 Leviton 8380-W 20 Amp, 125 Volt, Decora Plus 1 Amazon $46 $46<br />
Duplex Receptacle, Straight Blade,<br />
Hospital Grade, Self Grounding,<br />
Surge with Indicator Light, White<br />
19 Honeywell DS06-101- Dial-Set Female NPT, Single Union, 1 Amazon $77 $77<br />
SUT-LF Internally-Threaded PRV, 3/4”<br />
20 Everbilt ORS07812 3/4"x6’ Foam Self Seal Pipe Insul. 6 H. Depot $3 $18<br />
21 Commercial 54677141 4 ft. White LED High Output Wrap 1 H. Depot $88 $88<br />
Electric<br />
58 Watt, 5200 Lum., 4000K, White<br />
22 ProFlo PFXT5I 2.1 Gallon Thermal Expansion Tank 1 Build.com $63 $63<br />
23 ProFlo PFXPGLF10 Dual Scale, Liquid Filled, Pressure 1 Ferguson $32 $32<br />
0K<br />
Gauge 0-100# for Potable <strong>Water</strong><br />
24 Rinnai 185348NPP 2/4 Condensing Roof Term. Ext. Kit 1 TBD $63 ?<br />
25 Rinnai 169013 2/4 Pipe Clamp, Metal 4 TBD $6 ?<br />
26 Rinnai 229308NPP 2/4 Condensing Vent Pipe Ext., 10” ? $29 ?<br />
27 Rinnai 224056 2/4 Vent Support Bracket ? $39 ?<br />
Highlighted vent pieces in the table above are “just in case” and will be returned if unneeded.<br />
Concerns or suggestions about products listed should be brought to customer’s attention.<br />
Page 10 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Customer’s Idea of Construction Plan:<br />
+----------------+<br />
| DAY ONE | Identify Penetrations and Mount <strong>Water</strong> <strong>Heater</strong> (customer)<br />
+----------------+<br />
1.1 Centered 43 1/8 ” left of door casing, identify highest possible water heater location<br />
that accommodates vent path, and mark height where vent connects to unit<br />
(expected to be 95 5/8” off floor or 8 5/8” off ceiling).<br />
1.2 Mount water heater in precise location identified above.<br />
1.3 From both garage side and crawlspace side, consult with plumbing contractor to<br />
identify and mark penetrations for each of 6 connections:<br />
1) cold, 2) hot, 3) recirc, 4) gas, 5) condensate, and 6) electrical.<br />
1.4 Remove drywall, as needed, for staging of target pipes to water heater.<br />
1.5 Determine if framing changes are needed, and, if so, make them.<br />
1.6 Mount electrical box in location identified by plumbing contractor.<br />
1.7 Mount and connect Control-R Wi-Fi Module and connect to wireless push button.<br />
1.8 Leave water heater electrical panel breaker in the off position.<br />
+----------------+<br />
| DAY TWO | Stage New Pipes and Connect <strong>Water</strong> <strong>Heater</strong> (plumbing contractor)<br />
+----------------+<br />
2.1 Stage target water, condensate. control unit cable, and gas pipes in crawlspace and<br />
to water heater without disrupting service.<br />
2.2 Install dedicated recirc line to master bath, right-side sink.<br />
2.3 Confirm pipe cover will contain/hide water heater connections to hot, cold, recirc,<br />
condensate, gas, control unit cable, and electrical outlet (with water heater and<br />
shut-off valve power cables plugged in).<br />
2.4 Connect water heater to cold, hot, recirc, pressure release, gas, condensate, and<br />
power, leaving water and gas valves in the CLOSED positions<br />
2.5 Install pipe cover.<br />
2.6 Turn on water heater electrical panel breaker, and confirm readiness for transition.<br />
Page 11 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
+------------------+<br />
| DAY THREE | Transition from Tank to Tankless (plumbing contractor)<br />
+------------------+<br />
3.1 Turn off house water and gas supplies.<br />
3.2 Drain tank.<br />
3.3 Disconnect tank from water, gas, and vent.<br />
3.4 Remove tank from tank stand.<br />
3.5 Install whole house shut-off valve, check valve, pressure regulation valve, and<br />
expansion tank, and connect shut-off valve to power outlet under pipe cover.<br />
3.6 Complete crawlspace transition to new piping configuration.<br />
3.7 Measure and record height of existing B-vent roof termination, and then remove B-<br />
vent from garage up through roof termination.<br />
3.8 Install tankless 2/4 vent from unit through to roof, matching previous roof<br />
termination height.<br />
3.9 Turn on water and check for leaks.<br />
3.10 Turn on gas and check for leaks.<br />
3.11 Enable water and gas to water heater, and verify operational status of shut-off<br />
valve, check valve, pressure regulation valve, expansion tank, tankless water heater,<br />
condensate path, vent path, wireless control unit, wireless push button, and recirc.<br />
3.12 Clean Up<br />
> Insulate accessible 3/4” hot and recirc pipes in walls and in crawlspace.<br />
> Vacuum crawlspace areas where work was performed.<br />
> Confirm no leaks in crawlspace where work was performed.<br />
> Confirm no damage to other crawlspace facilities where people were crawling.<br />
Page 12 of 13
<strong>Water</strong> <strong>Heater</strong> <strong>Improvement</strong> 1518 W. Northfield Blvd. 37129<br />
Questions:<br />
1. Is expansion tank, air vent, or check valve needed when using dedicated recirc?<br />
Answer: Expansion tank and check valve are required with dedicated recirc.<br />
2. Should PEX or Copper be used for new plumbing?<br />
Answer: A mix of copper and PEX is appropriate for this project.<br />
3. Is a condensate neutralizer needed?<br />
Answer: No.<br />
4. Is it feasible to get the clean look depicted in “AFTER” garage diagram?<br />
Answer: Yes, IF… the cold water management arrangement can fit as depicted.<br />
5. Is it advisable to install a scale cutter in the water heater’s cold water supply line?<br />
Answer: Yes, IF… hot water heater manufacturer so advises.<br />
6. Are we within Rinnai specification for recirculation?<br />
Answer: Yes.<br />
7. Does AC-250 gas meter need to be replaced with higher capacity meter?<br />
Answer: Per ATMOS Steve at 615-566-3076, no. AC-250 handles up to 400KBTU/hr.<br />
8. Are we okay with 1” gas backbone pipe and 3/4” leg to water heater?<br />
Answer: Yes.<br />
9. What permits and inspections will be required for this effort?<br />
Answer: None.<br />
10. Who will be up on the roof removing the old vent and installing the new?<br />
Answer: Plumbing contractor<br />
11. Does it appear feasible to remove B-vent and run 2/4 vent in that path?<br />
Answer: Yes.<br />
12. Is page 3 description of AFTER pipe materials and sizes correct?<br />
Answer:<br />
13. Is page 4 representation of cold water management correct in components, order,<br />
and fit within existing space?<br />
Answer:<br />
14. Does PRV also serve as check valve, making cold supply check valve unneeded?<br />
Answer:<br />
15. Is page 5 – 7 representation of water heater plumbing workable in spatial<br />
arrangement and pipe routing?<br />
Answer:<br />
16. Is page 8 representation of qty=4 vent clamps workable and sufficient?<br />
Answer:<br />
17. Is page 9 recirculation vertical path workable?<br />
Answer:<br />
Page 13 of 13