Bryant 516 User Manual

Installation Instructions

516

ELECTRIC DUCT HEATER PACKAGE

These instructions are to be used in con
junction with the basic instructions for the
Model 516 Fan Coil Unit. Section II of this
instruction describes the installation of the
electric duct heater package with other than

the Model 516 air handlers .

SECTION I

The electric duct heater is designed to be
used with the Models 18- and 24-516 Fan Coil
Units. Refer to Table I, Ratings and Capaci
ties, for sizes and power inputs. Refer also
to the Dimensional Drawing.

The package, as shipped from the factory,
contains heater coils, a rating plate, a
sequencing relay (for 11- through 14,4-KW
size units), automatic temperature control,
and a manual temperature control switch.

Each heater has both sides of the power line
broken by a main contactor and a backup
contactor, and has an open set of contacts for
fan control.

Before Starting Installation:

1. Check local codes and ordinances for ad
ditional requirements.

2. Check the incoming power supply to be
sure that the rated voltage, frequency, and
phase correspond to that stamped on the unit
ratirig plate.

3 . Check the building power supply to be sure
that it is sufficient to handle the additional
electrical load imposed by this equipment.

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I

if the heater is to be installed within 6 inches
downstream from the Fan Coil. Mount the

collar on the duct flanges of the Fan Coil so
that the opening for the duct heater is on the
same side of the Fan Coil as the coil con
nections and rating plate. Make certain that
the flange is at the bottom of the duct heater
opening. This will insure that the heater is
placed at the correct depth.

Now, place the heater into the collar and
attach it to the collar with four sheet metal

screws.

If the application does not provide adequate
space for the duct heater to be installed
6 inches from the Fan Coil, then the duct
heater must be installed 48 inches down
stream from the Fgyj-Coil Unit-.

Installing the Electric Duct Heater Package

The duct heater package is designed for zero
clearance from combustible material. There
must be a 7 -1 /2 inch clearance in front of the
control box cover.

A collar for mounting the duct heater is pro
vided with each Fan Coil Unit. Use this collar

To install the he,
from the Fan Co
hole in the side
heater into place
template, drill fo|.r_moun
the heater with

An air filter mi
airstream.

es .downstream

8 inch
de the

Ox as a

attach

crews.
return

TOP VIEW

SIDE VIEW

10

D

Electric Duct Heater Dimensional Drawing

TABLE I - RATINGS AND CAPACITIES

Packoge

P/N

KW

Rating

208 V

65901D03 3
65901D04 4 10,254
65901D05 5
65901D06
65901D07

6

7 17,944 21,941
65901D08 8
65901D09
65901D010

65901D011

65901D012

9 23,071

.9.6

11

12

6590IDO13 13

6590IDO14 14

65901D015 14.4

12,817 15,672 17,065 1
15,381

20,508 25,076

24,610 30,091
28,199 34,479 37,543 2

30,762

33,326

35,889

36,915

* Rated at 240V, 60 cycle, single phase

** Includes blower motor and one heating element

* Capacity Btuh

7,690 9,403 10,239

230V 240V

12,538

18,807

13,652

20,478 1

No. of

Circuits

23,891 1
27,304

28,210

30,717
32,764

37,614

40,956

40,748 44,369

43,883

47,782 2

45,136 49,147 2

«i

o o

Field Wire Connections

Minimum Wire Size

AWG - 90° C - Copper

1
1

12
10
10
10 (2)40

8
1
1
1

8 (2) 50

6 (2) 60

6

10 ** (2) 30
10 (2) 40

2

2

10

8

10 ** (2) 30

8 (2) 50

10 ** (2) 30

8 (2) 50

10

8 - (2) 50

Max Fuse Size

Amps

(2) 20
(2) 20
(2) 30

(2) 50

(2) 60

** (2) 30

(2) 50

** (2) 30

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Limitations and Recommendations

1. The duct heaters should never be installed
from the bottom or the top of the duct - only
from the sides of the duct. The heaters must
always be installed on the discharge side of
the Fan Coil.

2. Only one duct heater may be used in any
one duct. If the capacity required exceeds the
output of one duct heater, select the total
number of heaters and proportion them in
separate runouts or separate ducts from the
plenum.

Table II - Air Delivery at Indicated Static Pressure

(Dry Coil, Less Filter)

Evaporator

Model

18-516

24-516

* Static pressure - inches w.c.

Motor

Speed Tap

High 930 920
Medium
Low
High 955
Medium
Low

*0.0

705
605

695
615 605

*0.1 *0.2 *0.3

CFM

890

905
700 690
600 590
940 915
690 680 670

675 650
580
880

600 580

*0.4

860

550
830
680
555

3. Install the duct heater at least 18 inches
away from any canvas duct connector. If the
heater must be located closer, replace the
canvas connector with an asbestos connector.

4 . The control enclosures of the duct heaters
must be completely accessible and so located
as to provide ventilation at all times.

5. The air duct should be installed in ac ­cordance with the standards of the National
Board of Fire Underwriters for the Instal
lation of Air Conditioning and Ventilating

Systems of other than Resident Type (pamphlet
no. 90A), and Resident-Type Warm Air Heat
ing and Air Conditioning Systems (pamphlet
no. 90B).

6. Each duct heater should be provided with
a fan relay. The heater and fan motor are to
be wired so that the duct heater cannot oper
ate unless the fan is on. Always hook the fan
interlock to the high-voltage side of the
system. Never use a fan delay with the
electric duct heater.

7. The coil of the secondary contactor
(general-purpose, continuous duty rated at
6000 cycles) must be wired in series with the
manual reset limit control (TMR).

NOTE; Observe at least one complete heating
cycle before leaving the installation.

Electrical Connections

Make all electrical connections in accordance
with the National Electric Code and any local
codes or ordinances that may apply.

Provide power supply (or supplies; 11- throu^

14.4-KW heaters will have two power sup
plies) for the heating capacity of the unit
being installed in accordance with Table I ­Ratings and Capacities. Power supply con
nections are made at the high-voltage termi
nals with wire suitable for at least 90° C

(194°F). It is good practice to ground casing
parts and to check factory wiring connections,
to be sure none were loosened in transit or

installation. Refer to Figures 5, 6, and 7 for
field wiring diagrams.

Thermostat Connection

The electric duct heater and Model 516 Fan

Coil Unit are designed for use with a 24-V
heat-cool thermostat, Bryant Model 883 .

Connect the thermostat and the low-voltage
terminal block on the side of the Fan Coil in
accordance with field wiring diagrams ­Figures 5, 6, and 7. Set the thermostat
heating anticipator at 0.8 amps .

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