Estia HWS-1501CSHM3-E, Installation Manual, Page: 5 / 15

AIR TO WATER HEAT PUMP SYSTEM INSTALLATION AND SERVICE MANUAL
5
EN
• Water supplies that have either inadequate pressure or where the supply
may be intermittent.
• Situations where it is not possible to safely pipe away any discharge from the
safety valves.
• Areas where the water supply consistently contains a high proportion of
solids or suspended matter unless adequate filtration can be ensured on the
inlet water supply.
3.0 INSTALLATION – PLUMBING
3.1 Refer to section IMPORTANT INSTALLATION POINTS . Plumb in valves in the
sequence shown in Diagram 2. Ensure the valves are installed in the correct
orientation by reference to the direction of flow arrows marked on them.
The water cylinder MUST be fitted with a Pressure Relief Valve that complies
with your local Plumbing and Building Regulations. (Safety Group supplied).
FAILURE TO PROVIDE ADEQUATE PRESSURE RELIEF WILL INVALIDATE
ANY GUARANTEE AND LEAD TO A DANGEROUS INSTALLATION. Any
discharge pipe connected to the Pressure Relief device must be installed in a
continuously downward direction in a frost free environment.
3.2 The water connections on the unit accept direct connection of 22mm outside
diameter pipe; nuts and olives are supplied for this purpose. The thread on the
connections is G3/4 to enable the use of G3/4 female connections to be used if
required. DO NOT use zinc plated water pipes. When steel pipes are used the
pipe should be insulated from the stainless steel vessel by using di-electric
couplings.
3.3 The sanitary water INLET is marked BLUE , the OUTLET is marked RED .
Several hot outlets can be served, however, individual site demands should be
considered when choosing capacity and the number of outlets to be served.
3.4 It is recommended that an isolating valve is fitted on the cold water supply to
the water cylinder.
Diagram 1
NOMINAL CAPACITY (litres)
A (mm)
B (mm)
C (mm)
D (mm)
SURFACE AREA (sq.m)
HOT WATER OUTPUT AT 60ºC (litres)
MIXED HOT WATER OUTPUT AT 40ºC (litres)
HEAT LOSS (kWh/24h)
HEATING TIME 15ºC TO 60ºC - USING ELECTRIC
CYLINDER HEATER ONLY (mins)
CAPACITY HEATED USING ELECTRIC
CYLINDER HEATER ONLY (litres)
150 210 300
315 315 315
354 354 354
800 1184 1474
1090 1474 2040
0.65 0.79 0.79
102 163 254
243 329.5 476
1.45 1.91 2.52
123 188 262
102 163 254