Operating manual - HeatPAC with reciprocating compressor
38/62
009332 en 2021.07
4.3.2
Cleaning in place
It is recommended to install valves and connections for chemical cleaning of open secondary circuits.
HeatPAC evaporators and condensers are fully welded heat exchangers and
cannot
be cleaned
mechanically.
For more information about chemical cleaning, please contact a Johnson Controls representative.
4.3.3
Temperature and flow control
The UniSAB III controller adjusts the compressor load by means of input from a PT100 temperature sen-
sor. Sensor threaded branch and sensor pocket are delivered with the heat pump unit. The sensor must
be fitted into the evaporator outlet pipe minimum 1 metre away from the evaporator.
4.3.4
Water and brine treatment
Brine and water for industrial refrigeration plants often contain impurities that can create a coating (foul-
ing) on the heat transferring surfaces. This reduces the heat transmission and in some cases the coating
causes corrosion of the heat transferring surfaces.
It is therefore
important
to keep brine and water under observation for both evaporator and condenser.
Consult a water treatment expert concerning additives to the system. The liability of Johnson Controls
Denmark does
not
include any damage that may occur due to harmful impurities in the system.
Be aware that all cooling towers and evaporative condensers experience a constant loss of water due to
evaporation. In order to keep the concentration of impurities low, a bleed system must be installed.
Note:
In order to obtain the correct mixture, it is recommended to premix secondary refrigerants (glycol
or brine) and to check it subsequently.
4.3.5
R717 detector
Installation of R717 detectors in the room and in the secondary circuit of an indirect system must be in
accordance with EN 378 and/or local codes and rules. Detectors in the secondary circuit in indirect sys-
tems are recommended regardless of the R717 charge limit according to EN 378.
The use of detectors in secondary circuits should be based on a risk assessment covering assessment
of:
•
risk of damaging secondary piping and components material (corrosion)
•
secondary refrigerant e.g. glycol in case of leakage
Leak detectors should be selected, installed and maintained in cooperation and accordance with the rec-
ommendations of the detector supplier.
Summary of Contents for SABROE HeatPAC
Page 1: ...HeatPAC with reciprocating compressor Operating manual EN ...
Page 2: ......
Page 63: ......
