Technical data

4
GEMINI HSC
4.0 specification
for gemini
vessel
The Gemini HSC calorifier is constructed from two concentric cylindrical tanks. The primary outer tank
is manufactured from boiler quality ST-37 carbon steel.
The domestic hot water vessel is constructed from A1S1 316 Ti stainless steel and is formed with
corrugated walls, and welded using inert Argon atmosphere followed by sand blast oxide removal.
connections
The secondary connections are formed in stainless steel and are mounted onto a removable inspection
plate which also carries the thermostat pocket.
immersion heater (optional)
The optional immersion heater is located in the primary water space below the secondary inner tank,
ensuring complete heating, and avoids being secondary water scale fouled.
insulation
A high standard of insulation is afforded using high density injected rigid polyurethane foam.
control panel
Each calorifier is equipped with an injection moulded control panel which houses a dial type
thermometer, control thermostat, immersion heater switch and electric connection terminal rail.
When specified for unvented hot water application, a manual reset high limit energy cut out is
also included.
outer jacket
The product is finished using injection moulded rigid PVC and top and base covers, with an additional
removable padded vinyl jacket.
wall mounted brackets
Models 60-i, 100-i and 150-i are supplied complete with wall mounting brackets to allow either vertical
or horizontal wall mounting.
key to principle components
1 Hot drawoff (vertical installation)
2 Cold feed (vertical installation)
3 Primary flow
4 Primary return
5 Primary air vent
6 Top moulding
7 Stainless steel domestic water vessel
8 Primary vessel
9 Thermostat pocket & dip tube stay
10 Base moulding
11 Dip tube
12 Padded vinyl jacket
13 Rigid polyurethane foam insulation
14 Immersion heater (optional)
Secondary return connection not
shown for clarity