background image

9

WATER COILS

1.

Piping should be in accordance with accepted industry standards. Pipework should be supported
independently of the coils. Water pipes are copper with sweet connections. USE WET TOWEL TO AVOID 
BURNING COIL CONNECTION GROMMETS. When installing coupling, do not apply undue stress to the 
connection extending through the unit.  Use a back-up pipe wrench to avoid breaking the weld between 
coil connection and header. 

2.

Connect the WATER SUPPLY TO THE BOTTOM  CONNECTION on the air-leaving side and the WATER 
RETURN TO THE TOP CONNECTION on the air-entering side. The extra bottom connection can be used 
for an auxiliary manual drain connection, and the extra top connection may be used for an automatic air 
vent or the extra connections can be capped. To insure proper venting, an external air vent in the piping is
recommended. Connecting the supply and/or return in any other manner will result in very poor 
performance. CAP UNUSED CONNECTIONS.

3.

The air vent at the uppermost point should be temporarily opened during system start-up to release all 
of the air from the coil. To maintain heat transfer capacity, periodically vent any air in coil. Vent is 
to be located behind connections side access door.

4.

Water coils are not normally recommended for use with entering air temperatures below 40

o

F. No control 

system can be depended on to be 100% safe against freeze-up with water coils. Glycol solutions or 
brines are the only safe media for operation of water coils with low entering air conditions.

CONTINUOUS WATER CIRCULATION THROUGH THE COIL AT ALL TIMES IS HIGHLY RECOMMENDED.

5.

Pipe sizes for the system must be selected on the basis of the head (pressure) available from the 
circulation pump. Piping should be in accordance with accepted industry standards. 

6.

For chilled water coils, the condensate drain pipe should be sized adequately to ensure the condensate 
drains properly. See 

DRAIN PAN TRAPS

and Figure 5. 

DIRECT EXPANSION (DX) COILS

1.

Piping should be in accordance with accepted industry standards. Pipework should be supported 
independently of the coils. Undue stress should not be applied at the connection to coil headers. 

2.

The condensate drain pipe should be sized adequately to ensure the condensate drains properly. See 

DRAIN PAN TRAPS

and Figure 5. 

3.

When connecting suction and liquid connections make sure the coil is free from all foreign material. Make 
sure all joints are tight and free of leakage.

4.

Greenheck does not supply compressor or condensing units, for further instruction on DX coil installation 
and operation contact your compressor and/or condenser manufacturer.

DRAIN PAN TRAPS

Drain lines and traps should be run full size from
the drain pan connection. Drain pans should have
drain lines and traps to permit the condensate from
the coils to drain freely. On all units with drain
pans, the trap depth and the distance between the
trap outlet and the drain pan outlet should be twice
the static pressure in the drain pan section under
normal operation to assure the trap remains
sealed.

Figure 5: Drain Pan Trap

6 in. min.

6 in. min.

Start-Up Instructions:

Optional Cooling Coils

Summary of Contents for MSCF

Page 1: ...items are stored inside the unit during shipping Care must be taken during installation to prevent damage to units MODEL MSCF Modular Small Cabinet Fan Installation Operation and Maintenance Manual W...

Page 2: ...ows panels removed 9 1 1 4 in knockout for recommended electrical wiring penetration or disconnect switch 8 8 8 8 8 7 9 Table of Contents Unit Layout Table of Parts Lifting Hanging Instructions Modula...

Page 3: ...to avoid damage see figure 1 Figure 1 3 Frame Rails By others Spreader bar Lifting lugs The MSCF should be hung by the factory supplied lifting lugs or field supplied frame rails as shown respectivel...

Page 4: ...26 38 2 5 3 5 43 45 6 75 26 18 5 6 75 6 75 26 6 6 75 26 50 2 5 3 5 55 50 6 75 26 18 5 6 75 6 75 26 6 6 75 32 50 2 5 3 5 55 65 6 75 32 18 5 6 75 6 75 28 6 6 75 36 50 2 5 3 5 55 85 6 75 32 18 5 6 75 6...

Page 5: ...nit A B C D E F Size w o Filter w Filter 12 in 24 in Vertical Sloped Hot Water CW DX Fan Motor Total 15 80 107 31 57 34 61 61 145 94 50 144 20 95 126 36 68 41 72 72 171 111 50 161 25 105 140 40 75 45...

Page 6: ...same as 4 row chilled water coil data see below Fluid enters the coil from the bottom connection In and exits from the top Out In Out Out In NOTE With airflow from left to right the fluid enters the...

Page 7: ...nnection between the scroll and the discharge of the fan If noise is an issue we recommend using heavy canvas connections on the inlet of the fan Refer to the Troubleshooting section of this manual if...

Page 8: ...g good duct practices Blower speed too low Check for correct drives and RPMs with catalog data Mixing box dampers closed Open and adjust Dirty or clogged filters Clean or replace Leaks in ductwork Rep...

Page 9: ...n of water coils with low entering air conditions CONTINUOUS WATER CIRCULATION THROUGH THE COIL AT ALL TIMES IS HIGHLY RECOMMENDED 5 Pipe sizes for the system must be selected on the basis of the head...

Page 10: ...ilters are installed check by holding up to a light source If light cannot pass through the filter it should be replaced Replacement filters should be of the same manufacturer and size When reinstalli...

Page 11: ...build up from plugging the drain and causing the drain pan to overflow Inspect twice a year to avoid the possibility of overflow Also drain pans should be kept clean to prevent the spread of disease C...

Page 12: ...Up Documentation Actual Voltage Hertz Phase Actual Amperage Blower Rotation Correct Air Volume Design cfm Actual cfm Drive Level of fan L or H Fan RPM Range min max 462888 MSCF IOM APRIL 2003 Warrant...

Reviews: