First Aquatherm Series, Инструкция по установке и эксплуатации

Страница: 6 / 12

6
This insures that any air in the water heater will
bypass the heating loop and then be purged each
time hot water is used in the dwelling. If this pip-
ing procedure is not followed the pump may “air
lock” and fail to pump hot water. Any other piping
procedure must address the elimination of air in
the heating loop. See figures 8 through 9 for ap-
proved piping variations. Contact the factory for
assistance with alternate piping procedures.
Air handler: Holes should not be drilled into the air
handler or coil cabinets (except through duct flanges)
since damage to the coils could result. Multiple air
handlers may be installed on one water heater pro-
vided the water heater and piping are sized properly.
Piping should be similar to that required for individual
air handler.
Flow control module (if required): The flow control
module can be installed anywhere in the hot water
loop to or from the air handler (between the water
heater and air handler). Modules must be installed
with the motor in a horizontal position. Junction box
should not be installed underneath the pump. Water
should flow from the outlet ( hot ) side of the water
heater to the air handler and then back to the supply
( cold ) side of the water heater. Arrow on bottom of
pump indicates the direction of flow when pump is
energized. The module is furnished with a 6 foot cord
and plug for convenient connection to a wall outlet.
For those areas where local codes require “hard”
wiring, discard the cord assembly and wire directly to
the connections within the 4 x 4 box using acceptable
wiring materials.
Water heater: Water heaters should be installed ac-
cording to the manufacturer’s installation instructions.
If a “back flow preventer” is required by code,
the T & P valve on the water heater may tend to
drip water because of pressure build-up in the water
(See figures 3, 4, 5, 14 and 15 for typical wiring
diagrams.)
Water piping:
1. Material: It is recommended that all piping be-
tween the water heater and hot water coil be
3/4 inch nominal (7/8 O.D.) copper except the
60HBQB and 60HBXB-HW is 1" nominal (1-1/8"O.
D.). Other material approved for potable hot water
systems may also be used if approved by local
code authorities.
2. Solder connections: All copper joints in the water
lines must be made with low temperature, non
lead solder!
3. Insulation: It is recommended that all piping
be adequately insulated to prevent freezing and
“freeze protector” ( see “accessories” ) be installed
on the hot water coil to prevent freezing when
piping is run in a space subjected to freezing
temperatures.
4. Length: Piping should not exceed 200 total feet of
length. Air handlers should not be installed more
than 40 feet above the water heater.
5. Shut - off valves: In addition to the main cold
water valve supplying the water heater, it is rec-
ommended that one shut - off valve be installed
on the hot water supply line to the air handler and
one on the return line from the air handler (or hot
water coil). These valves will facilitate air purging
during start - up ( see “start - up” ) and allow unit
isolation for repair.
6. Piping connections: On all cased type air han-
dlers the water inlet or “supply” connection to the
hot water coil is the one on the right as you face
the the air handler and will be marked accordingly.
Air handlers with internally installed circulating
pumps will not circulate water if piped back-
wards. Water lines to and from the air handler
must be connected to the horizontal connection
of the “ T ” fittings in the vertical hot and cold water
supply lines at the water heater. (See figure 6).