Trvs; Distribution Water Pump; Glycol - ESP Varimax I ASHP Installation And Operation Manual

good quality strainer in the return flow to the unit will invalidate the
warranty on the unit.

6.7 TRVs

Where standard steel radiators are to be fitted, careful consideration
should be given before using Thermostatic Radiator Valves (TRVs) because
they are not designed to be used with low temperature systems. If the
decision is taken to use TRVs, one should NOT be fitted in the same room
as a room thermostat.

6.8 Distribution Water Pump

If, as advised, you are using a buffer tank in the system, you will need to
fit a suitably sized water pump on the water distribution side of the
system. This water pump will need to be wired to receive an appropriate
signal from the heating system.

6.9 Glycol

The system must be protected from freezing by using a glycol solution in
the water circuits. The glycol/water should be added into the system
from the expansion tank of the water loop or via the top of the buffer
tank. The following table details the volume of the glycol/water solution
mix:
% Glycol
Ambient Temp
Heating Capacity Fluctuation
Power Input Fluctuation
Water Flow Fluctuation
Water Drop Fluctuation
Note: if the glycol/water mix is too strong, the water flow and water
pump will be affected and the efficiency of the unit will be
decreased. The above table is for reference only and you should use
a glycol/water solution that is suited to local conditions.
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V 1.7
10 20 30
-3 -8 -14
.991 .982 .972
.996 .992 .986
1.013 1.040 1.074 1.121 1.178
1.070 1.129 1.181 1.263 1.308
40 50
-22 -33
.961 .946
.976 .966
PASRW040-D-BP