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PR0-PAC SYSTEM OWNER INSTALLATION MANUAL
3. PLUMBING
a) The Calorex 'Pro-Pac' range heat pumps have water inlet/
outlet connections as follows:
MODEL
Pro-Pac 30
Pro-Pac 45
Pro-Pac 70
Pro-Pac 90
Pro-Pac 140
b) If an existing heater is retained, the Calorex heat pump should be
connected in parallel with it.
c) Suitable breakable couplings, isolating valves and flow meters should
be installed local to the heat pump.
d) Drain valve or plug should be fitted to lower pipe to facilitate drain
down in winter period.
e) The condensate drain at the base of the unit collects condensation
from the evaporator fins. This should be run away to waste via 1½"
domestic waste piping. It is therefore necessary to ensure that the
Calorex Heat Pump is placed on a level plinth so that the condensate
can run away with adequate fall to waste i.e. ½" per foot minimum. A U
trap should also be incorporated into the pipework.
CORRECT DRAINAGE
FOR CONDENSATE
f) When the pipework installation is complete the system should be run
and tested for leaks. If everything is then working normally the water
circulating system is ready to use.
g) Water circuit to and from unit to be capable of maintaining within
specified limits the rate of flow required by heat pump (see data sheet).
IMPORTANT
1. Maximum pressure of water in heat pump circuit should not exceed 10 bar.
8
Water in/out
connection size
1½ BSPM
1½ BSPM
1½ BSPM
1½ BSPM
2" BSPM
ELBOW
ADEQUATE FALL
'U' TRAP
SUPPLIED BY
CONTRACTOR
h) All pipework must be adequately supported with allowance for
expansion/contraction especially with plastic pipework.
i) It is recommended that when installing water system the last
connections to be made in the system should be breakable couplings
to avoid any stresses on to the unit connections.
SD566251 ISSUE 36
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