Grant HPMONO/IND125, Инструкция по установке, обслуживанию и эксплуатации

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Section 3: Primary Circuit Installation
3.1 GRANT MONOWAVE INDIRECT
HP CYLINDERS
Grant MonoWave indirect HP cylinders are specifically designed
for connection to most fully pumped Air Source Heat Pump
systems (such as the Grant Aerona³ Heat Pump range) - either
open vented or sealed systems having a maximum working
pressure of 3 bar and a maximum working temperature of 90ºC.
If you are in any doubt over the suitability of an Air Source Heat
Pump (other than a Grant Aerona³ heat pump) for use with the
cylinder, consult the heat pump manufacturer.
! WARNING !
Solid fuel or wood burning boilers and gravity circulation
systems must not be used on the primary circuit of an
unvented hot water system.
3.2 PRIMARY CONNECTIONS
1. The primary flow and return connections from the heat pump
should be made to the flow and return connections of the
cylinder. Refer to Figures 2-6 to 2-10, as appropriate.
The motorised valve (supplied) must be fitted into the primary
flow.
For all Grant MonoWave Cylinders except the 'A rated'
cylinder:
• The primary flow and return fittings are 22mm
compression.
• The valve has 22mm compression connections.
For the 'A rated' cylinder:
• The primary flow and return fittings are 28mm
compression.
• The valve has 22mm compression connections.
2. Locate the dual thermostat in the stainless steel pocket
(refer to Figures 2-6 to 2-10, as appropriate, for location) and
secure using the retaining screws on the thermostat housing.
3. Any automatic or manual air vent fitted to vent air from the
upper coil should be installed on the primary flow pipe to the
coil.
3.3 THE 2-PORT VALVE
To prevent gravity circulation when the boiler or heat pump
switches off, the 2-port motorised valve supplied with the
unvented hot water kit must be fitted in the primary flow pipe to
the cylinder and wired in accordance with either Figure 5-3 or 5-4,
as appropriate, for a Grant Aerona³ Heat Pump to comply with
current legislation.
For other makes of heat pump please check with the heat pump
manufacturer for connection details.
3.4 HARD WATER AREAS
If the cylinder is to be used with a boiler, in a hard water area, we
reccomend that the primary flow temperature be limited to 75°C.
This will help reduce the migration of suspended solids in the
water and help prevent the build up of lime scale.
3 PRIMARY CIRCUIT INSTALLATION
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