HBXB-HW Series - Republic Plumbing Supply Co.

1 FIRST CO. - Box 270969 - Dallas, Texas 75227 - Ph. (214) 388-5751 - Fax (214) 388-2255 - SeriesHydronic Air Handler, without PumpCooling or Heat Pump / HW Heat - 5 Tons, up to 131,700 BTUH HeatingThe HBXB-HW air handler is designed for use with today's high ef-ficiency split-system condensing units, heat pumps, hot water boilers, and Tankless Water Heaters. Boiler applications: The HBXB-HW can be directly wired to a boiler without adding additional relays or related controls. Multiple air handlers can be connected to a single boiler to provide comfortable, efficient, whole house hydronic space Water Heater applications: For Tankless Water Heater applications, install the optional high capacity flow control module (#940-2CV) in the piping between the Tankless Water Heater and the HBXB-HW air efficiencies are up to 15 SEER, depending on the outdoor condensing unit or heat pump model.

2 First Co's customer is ultimately responsible for confirming which fan coil models are compatible with selected outdoor unit(s) and which expan-sion valves (if any) are required. To determine certified indoor/outdoor combinations, go to or contact the Features: Multi-function micro-processor circuit board with these standard features: Blower Start Relay - Eliminates field installed boiler relay, allowing direct wiring from the boiler to the air handler Blower-on fan delay - (heating mode) - preheats the HW coil for 45 seconds. Blower-off fan delay - (heating and cooling models) - blower continues to operate for 45 seconds after thermostat is satisfied, for increased efficiency.

3 120V or 24V zone valve control - The micro-pro- cessor powers either 120V or 24V field supplied motorized zone valves. Factory or field installed R-410A TXV (cooling or heat pump operation) (non-bleed type) Manual Air Vent on hot water coil Blower door shut-off switch (except 60 HBXB-HW ) Slide out hot water coil for easier service Copper tube heating and cooling coils Compatible with all major brands of split condensing units and heat pumps Attractive baked-on powder coated cabinet Primary and secondary condensate drain connections Easily accessible 1" filterOptional Accessories: (see ) Freeze Protector - Reduces the possibility of the water coil freezing by switching the unit to the heating mode if the water temperature is nearing freezing conditions.

4 High capacity Flow Control Module for Tankless Water Heater applications (#940-2CV) Counterflow conversion kitsDX COOLINGBOILER HEATING(1-1/8 on 60 HBXB-HW )NOTES:1. All models are approved for installation with 0" clearance to combustible For downflow applications, select air handler 1/2 ton larger than the outdoor unit in order to achieve nominal Use 48 HBXB-HW for ton applications and field-convert fan motor to medium (field installed)NOTES: 1. Counterflow conversion not recommended where the air handler is installed above a finished No kit available for 60 HBXB-HW . This model is not approved for counterflow : Flow Control Modules are required when connecting to individual gas water : 1.

5 Above expansion valve kits are approved for both cooling only (non heat pump) and heat pump Valves are non-bleed type. Field added. Hard start kit may be Valves have screw-on SeriesBLOWER DATAUPFLOW / HORIZONTAL ONLYDOWNFLOW ONLYUNITMODELMOTORHP-AMPS(120V) vs. EXTERNAL STATIC - LOWLOW8106805303507806555053257156004602 70650545415220580490360160500420295---71 0640480330690620460310630575420260570520 38022054049035020024 hbxb -HW1/5 - - - - - is not approved fordownflow conversion(See for Model Numbers)EXPANSION VALVE KITS (Field installed) (cooling only or heat pump)PART NUMBERR22 FITS9 EVR22-418/24 hbxb -HW9 EVR22-530/36 hbxb -HW9 EVR22-648/60 hbxb -HWR410a9 EVR410-318/24 hbxb -HW9 EVR410-430/36 hbxb -HW9 EVR410-548/60 HBXB-HW -2-FREEZE PROTECTORKIT NUMBERFOR941-118 - 60 hbxb -HWCOUNTERFLOW KITSKIT NUMBERFOR919-1118, 24 hbxb -HW919-1230.

6 36 hbxb -HW919-1348 hbxb -HWCOIL CONNECTIONSUNITSIZELIQUIDSUCTION18/243/8 5/830/363/83/448/601/27/8 PHYSICAL DIMENSIONSUNITMODELABCDEFGHFILTERSIZE18 hbxb -HW24 hbxb -HW40202018-1/2162181618 X 20 X 130 hbxb -HW36 hbxb -HW42232021-1/2162181920 X 22 X 148 hbxb -HW482821-1/426-1/417-1/42182420 X 25 X 160 hbxb -HW522825-1/426-1/221-1/42222414 X 24 X 1(2 required)FLOW CONTROL MODULESPART NUMBERFOR940-3CV18 - 48 hbxb -HW940-2CV60 hbxb -HWNOTES:(1) Heat BTU is at 65 Entering Air Temperature.(2) Units are shipped with motors connected to high speed for cooling and medium speed for heating.(3) 190 EWT would increase the 180 EWT heating capacities by 200 EWT would increase the 180 EWT heating capacities by INSTALLED TXVMODEL SIZE (BTU)MODEL(PISTON)MODEL(R-410A TXV)18,00018 hbxb -HW18 HBXB-HW R410 TXV24,00024 hbxb -HW24 HBXB-HW R410 TXV30,00030 hbxb -HW30 HBXB-HW R410 TXV36,00036 hbxb -HW36 HBXB-HW R410 TXV42,000/48,00048 hbxb -HW48 HBXB-HW R410 TXV60,00060 hbxb -HW60 HBXB-HW R410 TXVAll TXV's are approved for cooling only or heat pump operation (non-bleed type).

7 NOTE: Expansion valve requirement depends on the selected outdoor unit. Go to or contact the factory for Numbers:In keeping with its policy of continuous progress and product improvement, First Co. reserves the right to make changes without notice. Maintenance for all First Co. products is available under "Product Maintenance" at @ .3 ESPGPM(HTG.) (FT. WTR.)BTUH (1000) ATENTERINGWATER TEMPERATURE140oF160oF180oF18 hbxb -HW18, , , , , , No. hbxb -HW714 (Replaces hbxb -HW513)APPLICATION GUIDELINES (for Boilers)Zone Valves Install a motorized valve with each air handler to control flow to that zone as 2 WIRING24 VOLTCLASS 2 WIRING24 VOLTCLASS 2 WIRINGCONDENSERCONTACTORCONDENSERCONTACT OR24V REMOTETHERMOSTAT24V REMOTETHERMOSTATNOTE: CAP OFFBROWN IF NOCONDENSING UNITIS USEDNOTE.

8 CAP OFFBROWN IF NOCONDENSING UNITIS USEDTACOSR 504 SWITCHINGRELAYZONE 1 ZONE 3 ZONE 2 ZONE 4XX120V CIRCULATORCONNECTIONSTTGWRYHBXB-HWFAN COIL24 VTT24 VBRNHBXB-HWFAN COILGWRCGWRY24 VTT24 VBRNGWRCMVMVBOILERTT4 CONDUCTORCLASS 2 WIRING24 VOLTCLASS 2 WIRING24 VOLTCLASS 2 WIRINGPIGTAIL LEADS FORMOTORIZED VALVEPIGTAIL LEADS FORMOTORIZED VALVE24V MOTORIZEDZONE VALVE24V MOTORIZEDZONE VALVECONDENSERCONTACTORCONDENSERCONTACTO R24V REMOTETHERMOSTAT24V REMOTETHERMOSTATNOTE: CAP OFFBROWN IF NOCONDENSING UNITIS USEDNOTE: CAP OFFBROWN IF NOCONDENSING UNITIS USEDGWRYHBXB-HWFAN COILGWRC24 VTT24 VBRNHBXB-HWFAN COILGWRCGWRY24 VTT24 VBRNTYPICAL WIRING SCHEMATICFOR MULTIPLE ZONE CONNECTIONSWITH ZONE VALVESTYPICAL WIRING SCHEMATICFOR MULTIPLE ZONE CONNECTIONS TOTACO SR-504/506 SWITCHING RELAY-4.