Temperature Rise; Irculator Lower Peed; Circulator Blower Fan - Amana GDH8 Installation Instructions Manual

Gas furnace
Hide thumbs Also See for GDH8:
Table of Contents

Advertisement

Installation's seconds per cubic foot: 34 sec/ ft
Conversion Factor (hours to seconds): 3600 sec/hr
Input = (Htg. value x 3600) ÷ seconds per cubic foot
Input = (1,000 BTU/ft
Input = 106,000 BTU/hr
This measured input must not be greater than the input
indicated on the unit rating plate.
5. Turn ON gas and relight appliances turned off in step 1.
Ensure all the appliances are functioning properly and
that all pilot burners are operating.
T
R
EMPERATURE
ISE
Air temperature rise is the temperature difference between supply
and return air. The proper amount of temperature rise is usu-
ally obtained when the unit is operated at the rated input with
the "as shipped" blower speed. If the correct amount of tem-
perature rise is not obtained, it may be necessary to change
the blower speed.
An incorrect temperature rise can cause condensing in or over-
heating of the heat exchanger. Determine and adjust the tem-
perature rise as follows. The temperature rise must be within
the range specified on the rating plate or Specification Sheet
applicable to your model. (Please contact your distributor or
our website for the applicable Specification Sheet referred to
in this manual.)
Temperature Rise Measurement
1. Operate furnace with burners firing approximately 15
minutes. Ensure all registers are open and all duct
dampers are in their final (fully or partially open) position.
2. Place thermometers in the return and supply ducts as
close to the furnace as possible. Thermometers must
not be influenced by radiant heat by being able to "see"
the heat exchanger.
3. Subtract the return air temperature from the supply air
temperature to determine the air temperature rise. Allow
adequate time for thermometer readings to stabilize.
3
x 3600 sec/hr) ÷ 34 sec/ ft
SUPPLY
AIR
RETURN
AIR
3
4. Adjust temperature rise by adjusting the circulator blower
speed. Increase blower speed to reduce temperature rise.
Decrease blower speed to increase temperature rise.
Refer to the following section for speed changing details.
3
C
IRCULATOR
T
O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK
OFF
TURN
POWER TO THE FURNACE BEFORE CHANGING SPEED TAPS
Furnaces are equipped with either a PSC or EEM circulator
blower motor. Either blower provides ease in adjusting blower
speeds. Refer to the Blower Performance Data in the back of
the manual for proper selection of heating and cooling speeds.
The cooling blower speed is shipped set on HIGH. The heat
blower speed for *(M,H,D)H8 / ADSS8 models is shipped on
MEDIUM. For *(M,D)H8 / ADSH8 models high heat ships on
MEDIUM and low heat is shipped on MEDIUM-LO. For GME8
/ AMEH8 models high heat ships on MEDIUM-HI (T4) and low
heat is shipped on MEDIUM (T3). These blower speeds should
be adjusted by the installer to match the installation require-
ments so as to provide the correct heating temperature rise
and the correct cooling CFM.
To adjust the circulator blower speed, proceed as follows:
1. Turn OFF power to the furnace.
2. Select the heating and cooling blower speeds that match
the installation requirements from the airflow table in the
Specification Sheet applicable to your model. (Please
contact your distributor or our website for the applicable
Specification Sheet referred to in this manual.)
3. Relocate desired motor leads to the circulator blower
heat and cool speed terminals on the integrated control
module. (Terminals are identified as LO HEAT, HI HEAT
and COOL (hot)) for *(M,D)H8 / ADSH8, GME8 & AMEH8
models and HEAT and COOL for *(M,H,D)S8 / ADSS8
models). If a heating speed and the cooling speed are
the same, a jumper wire must be used between the heat
and cool terminals.
4. Connect all unused blower motor leads to the "PARK"
terminals on the integrated control module. Any leads
not connected to the "PARK" terminals must be taped.
5. Turn ON power to furnace.
6. Verify proper temperature rise as outlined in Temperature
Rise section.
C
IRCULATOR
NOTE: Items in this section refer to the air circulator blower
fan in the *(M,D)H8 / ADSH8, GME8 & AMEH8 models, NOT
to the induced draft blower. The induced draft blower timing
sequence is not adjustable. The circulator blower fan timing is
adjustable only on models with optional "heating fan OFF delay"
adjustment pins or switches. It is NOT adjustable in any other
circumstances.
30
B
S
A
LOWER
PEED
DJUSTMENT
WARNING
B
F
T
A
LOWER
AN
IMING
DJUSTMENT
,
.

Advertisement

Table of Contents
loading

This manual is also suitable for:

Gds8Ameh8Ghs8Adsh8Adss8Mh8 ... Show all

Table of Contents