First Co SHW User Manual

24/36/48/60 SHW / SVW

BLOWER COIL UNITS

INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS

***** WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER *****

Altering the product or replacing parts with non authorized factory parts voids all warranty
or implied warranty and may result in adverse operational performance and/or a possible hazard­ous safety condition to service personnel and occupants. Company employees and/or contractors
are not authorized to waive this warning.

GENERAL

The manufacturer assumes no re­sponsibility for equipment installed
in violation of any code requirement.
These instructions give informa­tion relative to the installation of
these blower coil units only. For
other related equipment refer to the
proper instructions.
Material in this shipment has been
inspected at the factory and re­leased to the transportation agency
in good condition. When received, a
visual inspection of all cartons
should be made immediately. Any
evidence of rough handling or ap­parent damage should be noted on
the delivery receipt and the material
inspected in the presence of the
carrier's representative. If damage
is found, a claim should be filed
against the carrier immediately.

****** WARNING ******

Unit must not be operated
during building construction
due to excessive airborne
dust and debris. The units
must not be operated under
any circumstances without
an air filter in place.

BLOWER COIL UNIT

The installer must adhere strictly
to all local and national code re­quirements pertaining to the instal­lation of this equipment.

The SHW blower coil units are
designed to be installed in a horizon­tal position with discharge air in a
horizontal direction. The SVW
blower coil units are designed for
installation in a vertical position with
discharge air in a vertical direction.
Both unit models incorporate a posi­tive slope drain pan with a 3/4" NPT
nipple that exits the unit on the side
of the coil header connections. All
units need to be leveled in such a
way to insure positive slope toward
the condensate drain nipple.

NOTICE: Before mounting unit
remove red headed shipping
bolts and metal bushing at
blower base and blower outlet. In
addition remove, if present, the
wire tie securing motor to blower
rail before operating.

Sufficient clearance must be pro­vided on the side of the blower coil to
allow access to electrical controls
and to service the motor blower as­sembly.
Standard unit configuration is right
hand looking with the direction of
airflow. The unit can be field con­verted to left hand by repositioning
the coil, drain pan and remounting
the motor and pulleys.
NOTE: Motor rotation must be re­versed. See motor nameplate for
details.

AIR DISTRIBUTION
DUCTS

All duct work must be installed in
accordance with National Fire Pro-

tection Association Codes 90A and
90B. Ducts should be adequately
insulated to prevent condensation
during the cooling cycle and to mini­mize heat loss during the heating
cycle. All return air must be filtered
to prevent dirt buildup on the coil
surface. In many cases it is accept­able to use ducting of the same size
as the blower coil return air connec­tion. However, unique arrange­ments or long duct runs must be
confirmed by a local professional.
The manufacturer will not be re­sponsible for misapplied equip­ment.

ELECTRICAL

All wiring must comply with local
and national code requirements.
Units are provided with wiring dia­grams and nameplate data to pro­vide information required for neces­sary field wiring. A 4 x 4 electrical
box is provided on the cabinet for
connection of power supply.

****** WARNING ******

Any devices such as fan
switches or thermostats that
have been furnished by the
factory for field installation
must be wired in strict accor­dance with the wiring dia­gram that is supplied with the
unit. Failure to do so could
result in damage to compo­nents and will void all warran­ties.

L45321 3/02

These blower coil units can be
provided with a optional Class 2
relay/transformer for 24-volt control
circuits (3/4 HP maximum load rat­ing). Should any add-on equipment
also have a Class 2 transformer
furnished, care must be taken to
prevent interconnecting outputs of
the two transformers by using a th­ermostat with isolating contacts.

PIPING

These units employ a hydronic coil
designed for use with either hot or
chilled water. Each coil has a 1/4
inch bleed line.
All piping must be adequately
sized to meet the design water flow
requirements as specified for the
specific installation. Piping must be
installed in accordance with all ap­plicable codes. All chilled water
piping must be insulated to prevent
condensation.

****** WARNING ******

When connecting piping or
valve kits to blower coil units,
do not bend or reposition the
coil header tubing for align­ment purposes. This could
cause a tubing fracture re­sulting in a water leak when
water pressure is applied to
the system.

The piping connections on the
equipment are not necessarily in­dicative of the proper supply and
return line sizes. To minimize re­strictions, piping design should be
kept as simple as possible.

Caution: Prior to connecting to the
blower coil all external piping must
be purged of debris.
Condensate drain lines must be
installed with adequate slope away
from the unit to assure positive
drainage. Since the drain pan is
located on the suction side of the
blower, a negative pressure exists at
the drain pan and a minimum trap of
1-1/2 inches must be provided in the
drain line to assure proper drainage.
NOTE: Drain pan has positive slope
to the nipple which is located on the
coil connection side of the unit.

GENERAL PIPING
PRECAUTIONS

1. Flush all field piping prior to
connection to remove all debris.

2. Use wet cotton rags to cool valve
bodies, if present, when soldering.

3. Open all valves (mid-way for
hand valves, manually open on
motorized valves) prior to soldering.

4. When soldering to bronze or
brass, heat the piping while in the
socket/cup and begin introducing
the solder when the flux boils rap­idly. Avoid direct flame into the
solder joint.

5. Heat can only be applied to the
cup of the valve body for a minimal
time before damage occurs (even
with the use of wet rags.

6. Avoid rapid quenching of solder
joints as this will produce joints of
inferior quality.

7. The coil header or valve package
will not support the weight of the
connecting pipes. All pipes which
are connected to the unit must be
completely supported prior to con­nection to the unit.

8. Provisions must be made for
expansion and contraction of piping
systems. All horizontal and vertical
risers, including runouts, must be
able to withstand significant move­ment with temperature changes.
Failure to do so will result in damage
and failure of piping, fittings and
valves throughout the building.

9. Never insulate the heads or mo­torized portion of control valves.
Damage can occur in the form of
excessive heat build up and interfer­ence to the operation and moving
parts may result.

10. All piping fabricated in the field
should be installed with consider­ation of additional space for any
electrical routing that may be re­quired.

11. Connect all piping per accepted
industry standards and observe all
regulations governing installation of
piping systems. When all connec­tions are complete the system must
be pressure tested. Repair any sol­der joint leaks and gently tighten any
leaking valve packing nuts and pip­ing accessories as required. Hy­dronic systems are not designed to
hold pressurized air and should only
be tested with water.

STANDARD UNIT

L

N

GRD

BLK

BLK

120V-1PH-60HZ

FAN

MOTOR

SUPPLY

JUNCTION

FIELD WIRING

FACTORY WIRING

BOX

WIRING DIAGRAMS

OPTIONAL RELAY / TRANSFORMER

N

GRD

BLK

(FIELD INSTALLED)

L

BLK

120V-1PH-60HZ

SUPPLY

BLK

120V 24V

WHT

BLK

RED

RELAY / TRANSFORMER

3/4 HP Max. Load Rating

BLOWER

MOTOR

JUNCTION

BOX

FIELD WIRING

FACTORY WIRING

R

W

Y

C

G