LPCA 055-060-070-075-085-090-100-115 125-135-150-170HMB

10.3 Recommendations concerning the hydraulic circuit
ñ All field connections must be provided by a licensed technician
and must comply with the applicable local and national codes.
ñ Evaporator water connections should be made in accordance
with the unit outlook respecting the water inlet – and outlets.
ñ Water piping to be arranged so that the circulating pump
discharges directly into the evaporator.
ñ Install a flow switch or water differential pressostat (standard
component) in the water outlet piping to prevent the unit from
operating at a water flow, which is too low. A terminal is provided
in the switch box for the electrical connection of the flow switch
in the control circuit.
ñ To avoid erosion, it is recommended to install a filter in the
water inlet pipe.
ñ It is essential to install a thermometer in the water inlet/ outlet
pipe to check temperatures.
ñ Provide heat insulation with suitable vapour barrier around the
chilled water piping to prevent condensation and capacity loss.
ñ Provide drain connections at all low points of the system to
permit complete drainage for maintenance and/ or shutdown.
ñ Air vents should be provided at all high points in the system
located were they are easily accessible for servicing. The
water inlet pipe is specially designed to obtain a complete air
purge of the evaporator.
ñ Install an expansion tank on the suction side of the water pump
so that the water pressure on the pump suction will be positive.
ñ To avoid frequent on/off operation of the compressor, a
minimum water volume is required in the system (table 10.4).
ñ To assure proper operation of the unit, the water flow through
the evaporator must be within the specified limits in (table
10.4).
7
15
13
3
1 2
4
5
6
5
14
5
7
3
1
16
2 9
10
4
5
5
11
8
12
5
8
Example with one central pump
24
Interklima Hydronic systems
LPCA 055-170HMB ñ R407c/Tandem Scroll