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First Co HH Series Installation Operation & Maintenance

Horizontal hydronic fan coil units
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Installation, Operation, &
Maintenance
IOM 4403
Rev. A 12/24
*HH(X), *PHH(X), *RHH(X), *CHH(X)
HORIZONTAL HYDRONIC FAN COIL UNITS
ATTENTION
:
Read all instructions thoroughly and retain all manuals
for future reference.

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  • Page 1 Installation, Operation, & Maintenance IOM 4403 Rev. A 12/24 *HH(X), *PHH(X), *RHH(X), *CHH(X) HORIZONTAL HYDRONIC FAN COIL UNITS ATTENTION Read all instructions thoroughly and retain all manuals for future reference.
  • Page 2 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM COPYRIGHT The Manufacturer works to continually improve its products and as a result, it reserves the right to change design and specifications without notice. WARNING These instructions are intended as an aid to qualified, licensed, service personnel for proper installation, adjustment and operation of this unit.
  • Page 3 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM TABLE OF CONTENTS SAFETY CONSIDERATIONS GENERAL INSTALLATION PRECAUTIONS FAN COIL UNIT DIMENSIONS 9-12 AIR DISTRIBUTION DUCTS ELECTRICAL 13-14 WIRING DIAGRAMS 15-24 PIPING PRECAUTIONS PRE-STARTUP CHECKS INSTALLATION OF VALVE CLUSTER 27-28 OPERATION & MAINTENANCE 29-33 NOTES IOM 4403 (Rev A.
  • Page 4 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM SAFETY CONSIDERATIONS 1. READ THE ENTIRE MANUAL BEFORE STARTING THE INSTALLATION. 2. Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury damage. 3.
  • Page 5 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM GENERAL *HH Series units are ceiling mounted fan-coil units comprised of a blower assembly and a hydronic coil(s) WARNING which can be used with hot or cold water hydronic systems. Electric resistance heaters are available in a ELECTRIC SHOCK HAZARD variety of kW ratings.
  • Page 6 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM INSTALLATION PRECAUTIONS • WARNING Check unit prior to operation to ensure that the condensate water will drain toward the drain connection. An overflow drain or an auxiliary drain Use two or more people when moving and installing these units. pan under the fan coil may be required as a back Failure to do so could result in personal injury or death.
  • Page 7 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM FAN COIL UNIT This unit may be installed at altitudes up to 10,000 ft. NOTE (3,048 m). If a condensate overflow shut off switch, that is designed to The installer must adhere strictly to all local and national be installed in the drain line, is used in place of a secondary code requirements pertaining to the installation of this drain line then place it in the primary drain line between the...
  • Page 8 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM FAN COIL UNIT (CONTINUED) Figure 4 Front View (Supply) Figure 1 Top View Figure 5 End View Figure 2 Front View Figure 6 Rear View (Return) KNOCKOUT FOR DUCTED RETURN (Requires remote filter louver – field supplied) Figure 3 Side View (Ducted return requires non-louvered panel) IOM 4403 (Rev A.
  • Page 9 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM HH SERIES DIMENSIONS Figure 7 Uncased Version IOM 4403 (Rev A. 12/24)
  • Page 10 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM PHH SERIES DIMENSIONS Figure 8 IOM 4403 (Rev A. 12/24)
  • Page 11 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM RHH SERIES DIMENSIONS Figure 9 IOM 4403 (Rev A. 12/24)
  • Page 12 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM CHH SERIES DIMENSIONS Figure 10 IOM 4403 (Rev A. 12/24)
  • Page 13 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM AIR DISTRIBUTION DUCTS Ensure field wiring complies with local and national fire, safety, and electrical codes. Ensure voltage supply is STATIC PRESSURE within limits shown on unit rating plate. Contact the The total external static pressure must be considered local power company for correction of improper voltage.
  • Page 14 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM ELECTRICAL (CONTINUED) WARNING ELECTRIC SHOCK HAZARD • Disconnect all power supplies before servicing; lock out/tag out to prevent accidental electrical shock. Note: there may be multiple power sources. • Use copper conductors only. • Install all panels before operating. •...
  • Page 15 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS Figure 11 WD41X001 Figure 12 WD41X002 IOM 4403 (Rev A. 12/24)
  • Page 16 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 13 WD41X004 Figure 14 WD41X005 IOM 4403 (Rev A. 12/24)
  • Page 17 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 15 WD41X006 Figure 16 WD41X007 IOM 4403 (Rev A. 12/24)
  • Page 18 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 17 WD41X008 Figure 18 WD41X009 IOM 4403 (Rev A. 12/24)
  • Page 19 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 19 WD41X010 Figure 20 WD41X011 IOM 4403 (Rev A. 12/24)
  • Page 20 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 21 WD41X012 Figure 22 WD41X013 IOM 4403 (Rev A. 12/24)
  • Page 21 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 23 WD41X014 Figure 24 WD41X015 IOM 4403 (Rev A. 12/24)
  • Page 22 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 25 WDX41016 Figure 26 WDX41017 IOM 4403 (Rev A. 12/24)
  • Page 23 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 27 WD41X019 Figure 28 WD41X020 IOM 4403 (Rev A. 12/24)
  • Page 24 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM WIRING DIAGRAMS (CONTINUED) Figure 29 WD41X021 Figure 30 WD41X022 IOM 4403 (Rev A. 12/24)
  • Page 25 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM PIPING PRECAUTIONS 1. Flush all field piping prior to connection to remove These units employ a hydronic coil designed for use with either hot or chilled water. all debris. • All piping must be adequately sized to meet the 2.
  • Page 26 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM PRE-STARTUP CHECKS 10. Ensure all access panels are in place and secured. WARNING 11. Check that the water coil, valves and piping have been leak checked and insulated as required. ELECTRIC SHOCK HAZARD 12. Ensure that all air has been vented from the hot •...
  • Page 27 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM INSTALLATION OF VALVE CLUSTER Horizontal hydronic fan coil units may use either two - PROCEUDRE 2 way ( figure 2) or three way ( figure3) motorized valve 1. The one way valve assemblies will mount to the assembly.
  • Page 28 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM INSTALLATION OF VALVE CLUSTER (CONTINUED) Figure 34 Determination of Right-Hand/Left-Hand References IOM 4403 (Rev A. 12/24)
  • Page 29 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM OPERATION & MAINTENANCE The air filter should be cleaned or replaced every 30 days or more frequently if severe conditions exist. WARNING Always replace the filter with the same type as originally furnished. ELECTRIC SHOCK HAZARD COIL Failure to follow safety warnings exactly could result in Any dust or other contaminants which accumulate on...
  • Page 30 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM OPERATION & MAINTENANCE CONTINUED Compressor bearing products designed for A2L All possible ignition sources, including cigarette smoking, refrigerants may come equipped with a factory installed should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during refrigerant leak detection system.
  • Page 31 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM OPERATION & MAINTENANCE CONTINUED CHECKS TO ELECTRICAL DEVICES AND SEALED ELECTRICAL Leak detection fluids (such as the bubble method or COMPONENTS fluorescent method agents) are also suitable for use with Repair and maintenance to electrical components shall most refrigerants but the use of detergents containing include initial safety checks and component inspection chlorine shall be avoided as the chlorine may react with...
  • Page 32 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM OPERATION & MAINTENANCE CONTINUED The outlet for the vacuum pump shall not be close to D. Pump down refrigerant system, if possible. any potential ignition sources, and ventilation shall be E. If a vacuum is not possible, make a manifold so available.
  • Page 33 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM OPERATION & MAINTENANCE CONTINUED The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of the flammable refrigerant. If in doubt, the manufacturer should be consulted.
  • Page 34 *HH(X), *PHH(X), *RHH(X), *CHH(X) IOM NOTES IOM 4403 (Rev A. 12/24)
  • Page 35 P.O. Box 270969 Dallas, TX 75227 www.firstco.com or www.ae-air.com The manufacturer works to continually improve its products. It reserves the right to change design and specifications without notice. ©2022 First Co., Applied Environmental Air...

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