Plumbing; Condensate Drain - Calorex VARIHEAT VH3 AA600 Manuel D'installation

2.1 PLUMBING

POOL WATER
The Calorex 'SERIES 3 VARIHEAT' should be connected as shown in section 3.0.
If an existing heater is being retained then the 'VARIHEAT' should be connected between the filter and the
existing heater.
Pool water connections on the machine are 1" BSPM stubs.
The unit is supplied with 2 off each of the following PVC fittings - 1"BSPFx 1"M
Suitable breakable couplings, isolation, and drain down valves should be installed in the pool water inlet/outlet
pipes local to 'VARIHEAT' unit.
The heat exchanger in the 'VARIHEAT' unit will, on small pools, take the full flow rate of the recirculation
system. On larger pools a bypass or separate auxiliary pump may be necessary. This method can also be
used to reduce energy consumption, by the installation of a two speed or auxiliary pump by-passing the main
pump/filter to satisfy pool water heating and dehumidification without the need for the main pump to be
running.
When the pipework installation is complete the circulating pump should be switched on and the system
checked for leaks. Also check the filter gauge to see that there is not excessive back pressure.

CONDENSATE DRAIN

The condensate driptray in the 'VARIHEAT' unit collects the water removed by the dehumidification process,
It is therefore necessary to ensure that the'VARIHEAT' unit is placed on a level plinth so that the condensate
can run away and not overflow the edges of the driptray inside the machine.
All 'SERIES 3 VARIHEATS' have a 3/4" BSPM threaded condensate drain connection. The drain pipe should
run away with adequate fall to waste ie 1/2" per foot min. and must incorporate a 'U' trap & tun dish.
BOILER PLUMBING
The boiler connections on the machine are :-
3/4"BSPM on AW600/900
1" BSPM on AW1200/1500
for connecting the boiler water flow and return.
Suitable breakable couplings, isolation, and drain down valves should be installed in the boiler water
flow and return pipes local to the 'VARIHEAT' unit.
Water and air LPHW circuits internal to Calorex Heat Pump should be bled for air pockets. (Bleed valves fitted to
unit).
Refer to the boiler manufacturers instructions before designing the pipework system.
IMPORTANT GENERAL CONDITIONS
1. Do not route water pipes across service access panels or air inlet/outlets.
2. The water circuits to and from the 'VARIHEAT' unit should be capable of maintaining the specified
water flow limits required by the machine.
3. All pipework must be adequately supported with allowance for expansion and contraction especially with
regard to the plastic pipework.
4. It is recommended that when installing water systems the last connections to be made should be
adjacent to the 'VARIHEAT' unit to avoid undue stresses on the unit connections.
5. All pool purifying devices and chemical injection systems must be fitted down stream of the 'VARIHEAT'
unit with a non-return valve to prevent concentrated chemicals back feeding into the heat exchangers.
6. The practice of dosing chemicals direct into skimmer basket must not be allowed as this would result
in concentrated corrosive liquids passing over vulnerable metal components.
7. Water quality must be maintained not only relating to solids, etc but for pH between 7.4 - 7.8, and if pool
water is saline at a maximum concentration of 8mg/litre.
8. See Warranty Exclusions section 6.0 for total list of water quality limits.
1"F x 1½"M
1½" x 50mm F
Page 10 SD437350 ISSUE 22