Section 12: User instructions
Page 33
12.1 USEr inStrUctionS
Your Grant MonoWave HP cylinder with buffer has been designed
to give many years of trouble-free service and is made from
hygienic high grade stainless steel.
immErSion HEAtErS
Your Grant MonoWave HP cylinder with buffer is fitted with two
3kW immersion heaters (one in the cylinder and one in the buffer).
Refer to Section 5.1 for further details.
The immersion heater in the cylinder can be used to heat your hot
water when your heat pump (or boiler) is switched off, e.g. during
the summer months.
In the case of a Grant Aerona³ heat pump, this immersion heater
may also be used to assist in the heating of your hot water if you
have a Grant Boost Kit fitted. Check with your installer.
The cylinder immersion heater has been factory-set to position
4 (refer to Figure 5-1) to give a hot water temperature of around
60°C.
The immersion heater incorporates an in independent non self-
resetting over temperature cut-out device to prevent excessive
water temperatures. If this safety cut-out operates it can be re-set.
Refer to Section 6.3.
If the problem persists, please contact your installer.
dUAL tHErmoStAt
Your Grant MonoWave HP cylinder with buffer is also fitted with
a Dual Thermostat (mounted on the cylinder). Refer to Section
5.3.for further details.
The cylinder control thermostat has an adjustment range between
25°C and 65°C. It is recommended that it is set to 60°C.
The high limit (overheat) thermostat will automatically operate
if the water temperature reaches 90°C.If this operates it can be
re-set. To do this, first wait for the cylinder to cool down. Then
unscrew the plastic cap and press in the small re-set pin.
If the problem persists, please contact your installer.
tEmPErAtUrE SEttinGS
The hot water temperatures on the cylinder immersion heater and
dual thermostat should not be set any higher than 60°C otherwise
nuisance tripping of either the immersion heater safety cut-out, or
the high limit thermostat (in the dual thermostat) will occur.
If you are in any doubt, these temperatures adjustments should
be best left to your installer.
Hot WAtEr
When a hot tap is turned on there may be a short surge of water,
this is quite normal with unvented systems and does not mean
there is a fault.
When you first fill a basin the water may sometimes appear milky.
This is due to very tiny air bubbles in the water, which will clear
very quickly.
! WArninG !
if water is seen to flow from either the temperature &
Pressure relief (t&P Valve) valve or the Expansion relief
Valve (EV) on the cylinder seek expert advice immediately.
if the water is flowing from the t&P Valve, immediately:
1.
Shut off the electrical supply to the immersion
heater(s).
2.
Shut down the boiler or other heat sources to the
cylinder e.g. solar, heat pump, etc.
3.
do not SHUt off tHE WAtEr SUPPLY to tHE
cYLindEr.
4. contact your installer to check the system.
imPortAnt
do not tamper with any of the Safety controls fitted to the
cylinder. if you suspect a fault always contact a competent
installer who is qualified to work on unvented water
cylinders.
12 USEr inStrUctionS