Exhaust Fan Operation - Trane Voyager CV Installation And Maintenance Manual

Startup
Table 48. Supply air fan drive selections — 50 Hz
7.5 hp (5.6 10 hp (7.5
kW) kW)
Nominal
Tons Drive
(kW) rpm No rpm
458 A —
500 B —
23 (80) 541 C —
583 — 583
(a)
625 — 625
458 A —
500 B —
25 (88) 541 C —
583 — 583
625 — 625
500 B —
541 — 541
29 (103) 583 — 583
658 — —
664 — —
417 — 417
437 — 437
479 — 479
33 (118)
521 — —
562 — —
604 — —
437 — 437
479 — 479
42 (146) 521 — —
562 — —
604 — —
(a) For YC gas/electric only.
(b) For TC and TE Cooling only and with electric Heat units only.

Exhaust Fan Operation

To start the optional power exhaust fans, use the
economizer test procedures in
p. 58 to drive the economizer dampers to the open
position. The exhaust fans will start when the damper
position is equal to or greater than the exhaust fan
setpoint. If optional power exhaust is selected, an access
door must be field-installed on the horizontal return
ductwork to provide access to exhaust fan motors.
72
15 hp (10 20 hp (15
kW) kW)
Drive Drive Drive
No rpm No rpm
— — — —
— — — —
— — — —
D — — —
E — — —
— — — —
— — — —
— — — —
D — — —
E — — —
— — — —
C — — —
D — — —
(b)
— 658 F —
(a)
— 664 G —
H — — —
J — — —
K — — —
— 521 L —
— 562 M —
— 604 N —
J — — —
K — — —
— 521 L —
— 562 M —
— — — 604
Table 31, p. 56 - Table 36,
Rotating Components!
The following procedure involves working with live and
exposed rotating components. Have a qualified or
No
licensed service individual who has been properly
—
trained in handling exposed rotating components,
— perform these tasks. Failure to follow all safety
precautions could result in rotating components
—
cutting and slashing technician which could result in
—
death or serious injury.
—
The exhaust fan will start anytime the economizer damper
—
position is equal to or greater than the exhaust fan
—
setpoint.
—
Verify that the fans are operating properly and the CFM is
—
within the job specifications. Refer to power exhaust fan
—
performance tables beginning with
—
exhaust fan performance characteristics.
—
Available power adjustments:
—
1. The power exhaust fan(s) comes on based on the
—
position of the of the exhaust fan setpoint
—
potentiometer on the RTOM (Reliatel Options Module).
—
The setpoint is factory set at 25%. The exhaust fan(s)
will come on anytime the economizer damper position
—
is equal to or greater than the active exhaust fan
—
setpoint.
—
2. Physical damper blade stops limit the amount of
—
exhaust airflow by limiting the maximum opening of
—
the damper blades. These stops (sliding brackets
—
secured with wing-nuts) are present under the rain
—
hood on the non-modulating power exhaust option.
—
There is one stop on each side of each damper. The
practical range of blade position control is between
—
1.5" and 4.0" blade opening. The damper is wide-open
N
at 4.0". The stops on each side of a damper must be in
the same position, such that the damper blade
connecting member contacts the stops at the same
time.
3. The modulating power exhaust actuator tracks the
position of the economizer damper actuator such that
the power exhaust dampers proportionally follow or
track the fresh air damper position.
4. When the Statitrac option is selected, the exhaust
actuator will operate independently of the economizer
in order to relieve positive building pressure. If a Space
Pressure Transducer failure occurs, the unit will revert
back to fresh air tracking control.
5. The proportional offset between the dampers is
adjusted under the rain hood by hole position selection
on the power exhaust actuator jack shaft on the
damper linkage arm.
Note: The damper is a barometric damper that continues
to function as a pressure relief damper up to the
maximum stop position.
WARNING
Table 49, p. 73
RT-SVX34F-EN
for the