Magikist HWG20, Инструкция по эксплуатации, Страница: 7 / 28

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4.1 LOCATION
1) The water heater contains sensitive electronic
components that must not be exposed to water
spray. Choose a location such that the heater
will not be exposed to water spray of any kind.
Failure to do so may result in damage to
electronic components and void the warranty
on such components.
2) The water heater is approved for installation on
non-combustible material with 6 inches of
clearance from combustible walls. A minimum
clearance of 48 inches is required on the heater
front for access.
3) The water heater must be located in an area
that is protected from the weather and locations
where flooding may occur.
Avoid drafty
locations that may cause pilot outage .
4) In repair garages, the point of ignition shall be
not less than 4.5 feet (54 inches) above the
floor.
5) The location of the heater should be in an area
away from moving vehicles and should be
provided with sufficient protection and support
to prevent damage.
6) If the heater is being installed with a high
pressure pump, the heater should be installed
in a suitable dry location as near to the high
pressure pump unit as practical to simplify
connecting the water supply lines and electrical
lines between the two units.
4.2 MOUNTING
The heater must be mounted to a solid, non-
combustible base. Mounting holes are provided on
the inside bottom of the heater. The HWG40 has
four 1/2” holes while the HWG20 has three 1/2”
holes.
4.3 GAS SUPPLY
1) Pipe sizing must conform to local and
applicable codes (CGA B149.1 and B149.2).
2) Natural gas and LP (propane) heaters
incorporate different components such that they
are not interchangeable. Never supply LP
(propane) to a natural gas heater or natural gas
to a LP (propane) heater.
CAUTION: Unlike natural gas, LP (propane)
gas is heavier than air. If pilot outage should
occur, the floor areas should be vented and
blown clear before relighting the pilot.
IMPORTANT:
Licensed gas installer MUST ensure:
– 3.5" W.C. for natural gas heaters or
– 11" W.C. using an external regulator for LP
gas heaters
measured at the Pressure Tap Port on the gas
valve as shown in figure 4.3.1.
4.4 VENTING
1) Observe C.G.A. Standards B149.1 and B149.2
and local safety codes.
2) The draft hood furnished with the heater must
be attached to the flue outlet without alteration
using the same size vent as the draft hood
outlet (see specifications for flue diameter).
3) For venting in general, do not reduce size of
vent. Reductions in vent sizing for power
venters must be made after the draft hood. For
horizontal runs, maintain 1/4 inch pitch per foot.
Top of stack to be 2 feet above highest part of
roof or nearby obstructions. Provide an
approved cap for the stack outlet. Refer to
C.G.A. standards.
4) Use of type “B” venting is recommended and
must be installed in accordance with C.G.A.
standards B149.1 and B149.2 by qualified
personnel.
5) Provisions for other water heaters and/or other
gas fired appliances within the same enclosure
as the heater must be made to allow for ample
free air to enter the enclosure for combustion
and venting
. Failure to supply adequate free
air may result in the dangerous
accumulation of combustion gas and/or
severe damage to the heater coil, due to
reverse drafting of air down the heater vent.
If necessary, an automatic vent damper or
power venter should be installed.
4.5 AUTOMATIC VENT DAMPER
The following instructions, and all instructions in
this manual pertaining to automatic vent dampers,
refer to the Magikist model HWG-AD10 (for the
HWG40) or the HWG-AD7 (for the HWG20)
automatic vent dampers. Other vent dampers are
neither approved not tested for use with the
HWG40 or the HWG20 heaters.
Pressure Tap
Port
0
1
2
3
4
5
6
1
2
3
4
5
6
4.0 INSTALLATION
*** HEATERS MUST BE INSTALLED BY QUALIFIED PERSONNEL ONLY ***
Figure 4.3.1