6.1. When larger volumes of water are required than can be provided by one
heater, multiple installation can be made by connecting a number of heaters in
PARALLEL of the cold feed manifold (See Figure 6). This is the ONLY method that
is recommended. DO NOT plumb these heaters in series.
6.2. To set the heaters in this arrangement use the appropriate procedure as
described previously. Each heater in parallel must be set individually.
6.3. In this application restrictors capable of closing flow completely should be used
so that as each heater is set in turn, the other heaters in the installation may be
isolated.
NOTE - In this application it is advisable especially where low flow rates exist to
plumb the cold manifold in 7/8" pipe with 5/8"pipe spurs to each heater.*Not
This unit does not require an Pressure Relief Valve by UL standard, it is
recomended that you check with the local codes to find out whether this is required.
If one is required please refer to Figure 6.
YOUR MAREY POWER PACK SHOULD GIVE TROUBLE FREE OPERATION,
HOWEVER SHOULD A FAULT OCCUR THE TABLE BELOW SHOULD ALLOW
MOST FAULTS TO BE IDENTIFIED. FAULT FINDING SHOULD ONLY BE
CARRIED OUT BY A COMPETENT PERSON.
1312
SYMPTOM
POSSIBLE CAUSE
REMEDY
1. Water too hot.
A. Water flow too low. Increase the flow by turning the water control.
A. Electrical power to
the power pack heater
is off.
Ensure that the electronics to the power pack
is switched on the neon is lit.
B. Water flow too high. Reduce the flow by turning the water control.
C. Element fault. Check for open circuit.
2. Water too cold.
3. Temperature
varies while
showering,
cycling
hot/cold.
A. Pressure switch is
operating, normally
making a click as it
does so.
Water pressure/flow issue.
B. Input pressure is
below 1.0 bar (14.5 psi)
flow is not stable.
Ensure that your stop cock and servicing valve
are opened fully.
4. Power on
indicator not lit.
Isolating switch
ON but its neon
not lit.
A. Cartridge fuse or
miniture circuit breaker
(mcb) has operated
in your fuse box (or
consumer unit) or
switch fuse.
Switch off shower and isolating switch.
Renew fuse, reset the mcb. If they operate
a second time, contact a qualified electrician.
B. Residual current
device (rcd) or (earth
leakage circuit breaker)
has operated.
Follow the same procedure as above. If this
has happened with a split load consumer unit
on initial installation, check that the neutral core
of the power pak feed cable is connected to the
protected neutral bar of the unit.
5. Water emerges
from pressure
relief valve.
A. PRV has operated.
1. Switch off immediately at isolating switch.
2. Turn water off at the servicing valve (if fitted)
or stop valve.
3. Contact Marey Customer Service.
Fig. 06
*Not included.
(28 pages)
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