Magic Aire HHA Series, Инструкция по установке, эксплуатации и обслуживанию

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035-000029-001 Page 35 HHA IOM 1.4 10/11/2021
START-UP
Pre-Startup
Building Envelope— All building windows and doors
should be installed and closed before starting unit.
During summer construction, avoid unit sweating by
allowing for gradual pull down: use elevated chilled
water temperature, reduce chilled water flow rate
(gpm), use maximum available airflow.
Heating Fluid Temperature- Maximum entering wa-
ter temperature is 180°F, unless nameplate indicates
200°F.
CAUTION : If unit is marked for 200°F maximum en-
tering water temperature, customer must ensure that
water vaporization does not occur especially at high-
er elevations when entering water temperatures are
greater than 190°F.
Temperature Controls- Check that unit or wall-
mounted thermostat or field-supplied controller s con-
nected to the unit.
Outside Air and Freeze Protection -
WARNING: Insure that the unit is protected
against freezing conditions Failure to provide
freeze protection may result in equipment or
property damage.
Freeze protection measures are
customer-provided and installed and include but are
not limited to low-limit thermostats, automatic temper-
ature controls, and use of glycol based heat transfer
fluids (see section FREEZE PROTECTION OF WA-
TER PIPING).
1. If “locking quadrant” manual damper operator pro-
vided, set to desired position.
2. If damper actuator provided, insure that actuator
opens the damper when the fan turns on, and closes
when fan stops. Test mixing box controls to make
sure OA damper closes on power failure or upon acti-
vation of customer-supplied and installed low limit
thermostat or other freeze protection device.
Variable Frequency Drive (VFD) Setup
The VFD is factory programmed to protect the motor/
fan system and limit operating range as needed.
Refer to Table 2 for VFD parameter settings.
Start-Up Check List — Remove all construction de-
bris from unit interior. Remove tools and all foreign
objects before starting unit.
FILTERS — Install unit filters in all filter sections.
Protect open filters from drywall dust and construc-
tion debris.
MOTOR/FAN ASSEMBLY
1. Hand turn fan to make certain it turns freely and
fan wheel does not rub the inlet ring.
2. Check fan speed with a laser-type tachometer or
use VFD output to confirm operating speed.
Fig. 14 — Fan
Wheel Rotation
3. Check direction of rotation (see Fig. 14).
Arrow on drive side of fan housing indi-
cates correct direction of rotation.
4. Check vibration. If excessive vibration
occurs, check for the following:
A. Shipping screws removed.
B. Inadequate airflow.
C. Damaged wheel.
D. Loose bearings.
E. Loose mounting bolts.
F. Motor out of balance.
G. External vibration isolators improperly
adjusted.
H. Out-of-balance or corroded wheel
(rebalance or replace if necessary).
I. Accumulation of material on wheel
(remove excess material).
ROTATION
MARKING
Complete and submit the Warranty
Registration and Start-up Report
found at end of manual within ten
days of start-up to comply with the
terms of the Magic Aire warranty.