Installation manual

10 ©ESP Ltd. Sept 2008
4 . Installation 4 . Installation
Should you wish to site the Expansion Valve on the Cold Water Combination
Valve this can be done by unscrewing the connection nut beneath the Expan-
sion Valve on the Expansion Core Unit and removing the Expansion Valve.
The connecting nut and blanking plug should then be unscrewed from the Cold
Water Combination Valve and replaced with the Expansion Valve. Note: if the
Expansion Valve is fitted to the Cold Water Combination Valve the Expansion
Core Unit should not be used as the Check Valve within it will prevent free
passage of expanded water to the Expansion Valve. Ensure the discharge from
the Expansion Valve can be correctly installed.
If a balanced pressure cold water supply is required to a thermostatic shower
mixer valve this may be tee‟d off the supply to the unit immediately after the
Cold Water Combination Valve (see Figure 4). Branches to drinking water out-
lets should be taken before the valve to avoid the possibility of warm expanded
water being drawn from the tap.
4.5 EXPANSION CORE UNIT (see Figure 3)
Should a balanced pressure cold water supply be required for other cold water
outlets the Expansion Core Unit supplied should be used. The Core Unit should
be fitted into the pipework between the Cold Water Combination Valve and the
unit (note direction of flow arrows). The cold water balanced draw off connec-
tion should be taken from between the Cold Water Combination Valve and the
Expansion Core Unit (see Figure 5). The Expansion Valve connection on the
Cold Water Combination Valve should remain blanked off using a blanking nut
and seal. Ensure the discharge from the Expansion Valve can be correctly in-
stalled.
Hot water air source heat pump Hot water air source heat pump