Accessories - Camus Hydronics MFH060 Installation, Operation And Service Manual

7.

ACCESSORIES

WATER FLOW SWITCH (shipped loose)
A water flow switch is shipped loose and is to be installed in the outlet piping on all heating boilers and hot
water supply boilers. The flow switch is wired in series with the 24VAC safety control circuit. A diagnostic
light will be indicated on the control display on a low flow condition.
LOW WATER CUTOFF (If Equipped)
If this boiler is installed above radiation level, a low water cut-off device must be installed at the time of
boiler installation. Some local codes require the installation of a low water cut-off on all systems. Electronic
low water cut-offs are available as a factory supplied option on all models. Low water cut-offs should be
tested every six months. The normally open switch contact of the low water cutoff is to be wired in series
with the flow switch. A diagnostic light will be indicated on the control display on a low flow condition.
Caution: remove jumper when connecting to 24 VAC circuit.
RELIEF VALVE (shipped loose)
This appliance is supplied with a relief valve sized in accordance with ASME Boiler and Pressure Vessel
Code, Section IV ("Heating Boilers"). The relief valve is to be installed in the vertical position and mounted
in the hot water outlet. No valve is to be placed between the relief valve, and the appliance. To prevent
water damage, the discharge from the relief valve shall be piped to a suitable floor drain for disposal when
relief occurs. No reducing couplings or other restrictions shall be installed in the discharge line. The
discharge line shall allow complete drainage of the valve and line. Relief valves should be manually
operated at least once a year.
CONDENSING HEAT RECOVERY MODULE PIPING CONFIGURATIONS
Caution: If isolation valves are provided on the CHRM, the provision of a relief valve at the outlet of the
secondary is recommended .This valve is to be sized at minimum for 10% of the input of the appliance and
is to be piped to drain in a manner similar to the appliance relief valve.
CHRM IN SERIES WITH PRIMARY HEAT EXCHANGER (INTEGRATED LOOP)
The supply water (Cold water) is pre-heated by CHRM and fed into the outlet of the primary Heat
Exchanger. Provisions must be made to prevent cold water below 115ºF (46ºC) entering the Primary Heat
Exchanger.
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