Rheem Manufacturing 1x2000, Руководство по установке

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19
FIELD INSTALLED OPTION
ACCESSORIES
ELECTRONIC AIR CLEANER
1. Electronic air cleaner line voltage
power can be supplied from the
screw terminal “EAC” and a line
voltage neutral screw terminal on
the control board. See Figure 15.
This will power the electronic air
cleaner whenever the circulating air
blower is in operation.
HUMIDIFIER
2. Humidifier line voltage power can be
supplied from screw terminal “HUM”
to a line voltage neutral screw
terminal on the control board. See
Figure 15. This will power the
humidifier whenever the burner is on
and the circulating air blower is
operating in the heating mode.
NOTE: Maximum current –1.0 amps
for each option.
FURNACE TWINNING
INSTALLATIONS
Twinning operation of two furnaces,
installed side-by-side, connected by a
common duct system with main power
supplied by the same source, and
controlled by a common thermostat can
be done with the UTEC 1095-101
integrated control boards.
The Status LED will flash 5 times if the
twinning is not set up properly.
Single Stage Thermostat
(See Figure 16)
a. Control board “ONE” is on furnace
connected to the thermostat.
b. The 24 VAC supply to both control
boards must be in phase with each
other.
c. Connect the “W2”, “C” and “TWIN”
terminals to counterparts on each
control.
d. Both control boards must have
switch #3 in “ON” position.
e. Adjust the heat anticipator current to
0.15 amps.
Two Stage Thermostat
(See Figure 17)
a. The 24 VAC supply to both control
boards must be in phase with each
other.
b. Control board “ONE” is on the
furnace connected to the thermostat.
c. Connect the “W”, “W2”, “C” and
“TWIN” terminals from one control to
the “W”, “W2”, “C” and “TWIN”
terminals of the second control
respectively.
d. Both control boards must have
“Twin” switch #3 in “ON” position.
e. Adjust the heat anticipator current to
0.15 amps.
NOTE: Leave Switch #4 in the “OFF”
position. It does not affect the
twinning operation.
HIGH ALTITUDE KIT
Models with inputs over 50,000 btu/hr
installed at altitudes of 5,000 feet and
above require a low fire pressure switch
change. These may be ordered under
Option Code No. 278. Models with this
option code will have the additional
pressure switch, Kit no. RXGY-13,
packed with the furnace. This kit
includes pressure switch no. 42-23648-
07, which has a set point of -0.10
(
W.C.
and burner orifices which should be
changed for altitudes of 8,000 feet and
above for U.S. models. The low fire
pressure switch is installed in the lower
position on the furnace. Orifice size
information is shown on the table
below:
U.S. 0-7,999 Ft. 8,000 Ft. & Above
Natural gas #42 #43
LP gas #54 #55
CANADA 0-1,999 Ft. 2,000 Ft. to 4,500 Ft.
Natural gas #42 #42
LP gas #54 #54
NOTICE: DO NOT make any attempt
to rerate the furnace by changing
orifices or the gas pressure. Allow the
natural derate of the gas to occur. The
natural derate will range from
approximately 1.8% to 2.8% per 1,000
feet.
FIGURE 15
LINE VOLTAGE CONNECTIONS
UTEC 1095-101 CONTROL BOARD
ST-A0761-01
Install the room thermostat in
accordance with the instruction sheet
in the box with the thermostat. Run the
thermostat lead wires inside the control
compartment. Connect the thermostat
as shown on the wiring diagram. Never
install the thermostat on an outside
wall or where it will be influenced by
drafts, concealed hot or cold water
pipes, lighting fixtures, radiation from
fireplace, rays of sun, lamps,
television, radios or air streams from
registers. Refer to the instructions
packed with the thermostat for best
anticipator adjustment or selection or
see below.