C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Tranquility
®
Compact Belt Drive (TCH/V) Series
Rev.: July 25, 2017
54
C l i m a t e M a s t e r Wa t e r - S o u rc e H e a t P u m p s
Blower Adjustment
Airfl ow and External Static Pressure
Selection Adjustment
- The TCH/V Series is available
with standard, low, and high static options. These op-
tions will substitute a different blower drive sheave for
each static range. In addition certain static ranges (bold
print in Tables 5a through 5k) may require the optional
large fan motor. Please specify static range and motor
horsepower when ordering. See model nomenclature.
Sheave Adjustment
- The TCH/V Series is supplied
with variable sheave drive on the fan motor to adjust
for differing airfl ows at various ESP conditions. Select
an airfl ow requirement on the left side of the table,
then move horizontally to right under the required ESP.
Note the sheave turns open, rpm and horsepower for
that condition. Fully closed the sheave will produce the
highest static capability (higher rpm). To adjust sheave
position: loosen belt tension and remove belt, loosen set
screw on variable sheave (on fan motor) and open sheave
to desired position. Retighten set screw and replace belt
and set belt tension as below.
Sheave and Pulley Alignment
- Verify belt is straight;
misalignment will cause premature belt failure. Adjust
sheave if needed.
Belt Tensioning
- An overly loose belt will, upon motor
start, produce a slippage 'squeel' and cause premature
belt failure and or intermittent airfl ow. An overly tight belt
can cause premature motor or blower bearing failure.
Belt Tensioning Procedure - TCH/V
1. Remove belt from motor sheave
2. Lift motor assembly
3. Loosen the 5/16" hex nuts on the grommet motor
adjustment bolts (2 per bolt). To increase the belt
tension loosen the top hex nut. To decrease the belt
tension loosen the bottom hex nut.
4. Turn the bolts by hand to the desired position then
tighten the 5/16" hex nuts ( 2 per bolt).
5. Lower the motor assembly
6. Install the belt
7. The belt should be tensioned tensioning gauge
method such as the Browning Belt Tensioner to set
proper belt tension (See next page).
Notes:
- Motor position should not need adjustment.
- Motor sheave position is at mid position of each
sheave. Thus the motor sheave is typically 2.5
turns open on a 5 turn sheave.
Special Note for AHRI Testing
The Units should be adjusted as follows for rated airfl ow:
TCH/V072 - 2400cfm/2.5 turns and 0.57 in wg ESP
TCH/V096 - 3200cfm/3.0 turns and 0.62 in wg ESP
TCH/V120 - 4000cfm/3.0 turns and 0.59 in wg ESP
CAUTION!
CAUTION!
Always disconnect all power supply(s) to unit
prior to making belt or sheave adjustments. Inadvertently
starting of the motor can cause damage to the equipment
and personal injury.
