Camus Hydronics MicoFlame Grande MFH2000 Installation, Operation And Service Manual - page 11
9
7 WATER PIPING
Check all applicable local heating, plumbing and
building safety codes before proceeding.
The circulating pump must be installed at the
appliance inlet. Always pump toward the heat
exchanger. Minimum operating system pressure
when hot must not drop below 30 PSIG.
Improper piping of this appliance will void the
manufacturer’s warranty. Improper piping
arrangement may cause heat exchanger tube
failure resulting in flooding and extensive
property damage. Excessive water hardness
causing scaling in the copper heat exchanger
tubes in not covered under the manufacturer’s
warranty. Excessive pitting and erosion of the
internal surface of the copper heat exchanger
tubes due to high water velocity or chemicals is
not covered under the manufacturer’s warranty.
Improper operation of this appliance by
permitting return water temperature below 115°F
will result in flue gas condensation leading to
corrosion deposits on the heat exchanger tubes
and will void the warranty.
To eliminate trapped air, install venting devices
at high points in the system as well as in the
piping on the suction of the pump and in the
piping on the discharge of the appliance.
Suitable pipe hangers or floor stands must
support the weight of all water and gas piping.
The appliance must be installed so that the gas
ignition system components are protected from
water (dripping, spraying, rain, etc.) during
appliance operation and service (circulator
replacement, control replacement, etc.)
Shut off valves must be installed at the inlet and
outlet connections of the appliance to provide for
isolation of the heat exchanger for servicing. If
the appliance is installed above radiation level, it
must be provided with a low water cutoff device
at the time of appliance installation.
This appliance is of a low mass design, which
provides for instant heat transfer. Special
attention to water flow rates will ensure that
temperature rise does not exceed 35 °F (19.4
°C). The following Table 6 is provided as a
guide. For application in areas known to have
hard water conditions, or for soft water contact
factory for recommendations.
Table 6 – Flow vs. Head Loss for Various
Temperature Rise
20 °F
Model
USGPM
∆
P ft.
2000
170
5.1
2500
200*
8.2
3000
200*
8.2
3500
200*
10.2
4000
200*
10.2
30 °F
Model
USGPM
∆
P ft.
2000
113
2.4
2500
141
4.3
3000
170
6.2
3500
198
10.2
4000
200*
10.2
35 °F
Model
USGPM
∆
P ft.
2000
97.0
1.8
2500
121.0
3.3
3000
146.0
4.5
3500
170.0
7.7
4000
194.0
9.8
* Maximum flow recommended. Temperature rise
will be exceeded. CuNi heat exchanger should be
considered for flow rates exceeding maximum
recommended flows.
7.1
PROTECTION DEVICES
PRESSURE 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.
CAUTION
Avoid contact with hot discharge water