Rheem RGRJ series Installation Instructions Manual page 49

SETTING BLOWER
TIMINGS
The Honeywell and UTEC control
boards have four quick connect
terminals for connecting the motor
speed leads. These are:
1. FAN SPEED — motor runs on
this speed when the thermostat
is in the "FAN ON" position.
2. COOL — connect desired
cooling speed.
3. HEAT — connect desired
heating speed.
4. HEAT/COOL (not available on
UTEC-925 control board) —
connect desired speed when
heating and cooling speed are
the same.
IMPORTANT: Do not connect any
motor speeds to "HEAT" and "COOL"
if you use the "HEAT/COOL" terminal.
5. If heating and continuous fan
speed are the same, "piggyback"
jumper across "FAN" and "HEAT"
terminals.
See Figures 53, 54, 55 and 56 for
instructions for setting the blower
"OFF" timings.
If cooling speed and fan speed are
desired to be the same, this may be
accomplished by not connecting "Y"
to the integrated furnace control.
If desired for cool, fan and heat to all
be the same speed, then "piggyback"
jumper "H/C" to "FAN" and do not
connect "Y" to the integrated furnace
control. Do not connect anything to
"H" or "C."
FIGURE 53
UTEC -920 & -927
BLOWER OFF TIMINGS
ON
NOTE: SWITCHES 3 & 4 ARE USED
FOR TWINNING APPLICATIONS.
I402
OFF TIME SWITCH 1 SWITCH 2
90 SEC. OFF
120 SEC. OFF
160 SEC. ON
180 SEC. ON
FIGURE 54
JOHNSON CONTROLS
G961DAJ-2401
BLOWER OFF TIMINGS
NOTE: SWITCHES 1 & 2 ARE USED
FOR TWINNING APPLICATIONS.
I402
OFF TIME
90 SEC.
120 SEC.
160 SEC.
180 SEC.
FIGURE 55
HONEYWELL E2001
BLOWER OFF TIMINGS
OFF TIME
90 SEC.
120 SEC.
160 SEC.
180 SEC.
FIGURE 56
UTEC - 925
BLOWER OFF TIMINGS
OFF TIME
90 SEC.
120 SEC.
160 SEC.
180 SEC.
ON
OFF
OFF
ON
ON
I402
SWITCH 3 SWITCH 4
ON ON
OFF ON
ON OFF
OFF OFF
(TIMER IS
RED BLOCK
ON BOARD)
I335
SWITCH 1 SWITCH 2
ON OFF
OFF OFF
OFF ON
ON ON
(TIMER IS
RED BLOCK
ON BOARD)
I335
SWITCH 1 SWITCH 2
OFF ON
OFF OFF
ON OFF
ON ON
GAS FURNACE (DIRECT
DRIVE) INSTRUCTIONS
FOR CHANGING BLOWER
SPEED
WARNING
!
DISCONNECT THE ELECTRICAL
SUPPLY TO THE FURNACE
BEFORE ATTEMPTING TO
CHANGE THE BLOWER SPEED.
FAILURE TO DO SO CAN CAUSE
ELECTRICAL SHOCK RESULTING
IN PERSONAL INJURY OR DEATH.
The blower motor is wired for blower
speeds required for normal operation
as shown.
If additional blower speed taps are
available (leads connected to "M1"
and "M2" on the electronic control),
speeds may be changed if necessary
to fit requirements of the particular
installation. Reconnect the unused
motor leads to "M1" or "M2." Check
motor lead color for speed
designation.
Heating speeds should not be
reduced where it could cause the
furnace air temperature to rise to
exceed the maximum outlet air
temperature specified for the unit.
IMPORTANT: Always check air
temperature rise after changing the
heating speed for any reason.
49