Beacon-Morris Twin-Flo III Installation Manual
TFII-11
Beacon/Morris
TWIN-FLOIII® HEATER
INSTALLATION INSTRUCTIONS • TYPES K, W, & F
ATTENTION: READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO INSTALL, OPERATE, OR
SERVICE THE BEACON MORRIS TWIN-FLO III HEATERS! RETAIN THESE INSTRUCTIONS FOR FUTURE
REFERENCE.
INSPECT THE SHIPMENT IMMEDIATELY WHEN RECEIVED TO DETERMINE IF ANY DAMAGE HAS
OCCURRED DURING SHIPMENT.
PRIOR TO INSTALLATION, CHECK FOR ANY VISIBLE DAMAGE. MAKE CERTAIN THAT ANY
LOOSE PARTICLES ARE REMOVED (ESPECIALLY IN THE BLOWER ASSEMBLY AREA).
GENERAL DESCRIPTION
TWIN-FLO III heaters are for use with forced hot water residential heating systems and consist of a copper tube, aluminum finned heating element, with an electric motor and blower of unique cross flow design. Their purpose is to deliver a
comfortable stream of warmed air, at or near floor level, and their construction is extremely compact so minimum space is
required for installation. The type K heater is primarily used in horizonal floor installation, for example: under a kitchen
counter cabinet, or bathroom sink enclosure. Type W is for verticle mounting, fully recessed in the wall studs, with the air
discharged upward through a flush mounted, louvered front panel. Type F is a surface mounted wall unit, with the air
discharged evenly through a louvered front panel in an upward direction. All types have heating elements with 1/2"
nominal (5/8 O.D.) copper tube connections, and 115V. electric blower motor, interwired with a 120° F (49° C) reverse
acting aquastat that prevents operation until hot water is circulating. These units are NOT intended to be used on one or
two pipe steam systems. See bottom of page 7. For gravity fed systems, it is recommended that a separate circulator pump
be installed for the kick space heater.
INSTALLING TWIN-FLO III TYPE K
1. Select a location under the bottom shelf of a cabinet that meets the minimum dimensions shown in Fig. A.
2. CUT AN ACCESS PANEL THROUGH THE BOTTOM OF THE CABINET AT THIS LOCATION, LARGE ENOUGH
FOR INSTALLATION AND SERVICE. IT IS RECOMMENDED THAT THIS ACCESS PANEL BE CONSTRUCTED
SO ANNUAL CLEANING OF THE BLOWER FAN AND COIL FINS CAN BE EASILY ACCESSIBLE.
3. At this location, center and cut an opening in the toe-space riser 4'' high x 11'' long (model K42) (See figure A)
or 4'' high x 18'' long (model K84) (See figure B) or 4" high x 23" long (Model K120). (See figure C).
4. Set the TWIN-FLO III in the space at finished floor level and check piping and wiring locations. The air outlet
should be facing but not extending beyond the toe-space riser at the opening. The air outlet should also be located at
the bottom portion of the 4'' toe-space riser (See figure A) at finished floor level. Make sure the switch is accessible
through the grille openings. The front of the unit should fit flush to the inside of the toe space riser.
5. Install the wire grille over the 4'' toe-space opening by clamping in place with two end caps and screws provided. The
verticle bars should be on the inside (fig. A).
6. If using the TWIN-FLO "Easy Connect" Flexible Hose Connection Kit, see those installation instructions.
7. Next, prepare the heating element for pipe connections (this procedure will also pertain to Model types W and F).
Remove the 3 screws from the electric conn. box. Unsnap (pull) the thermostat clamp from the return copper U-bend.
Holding down the top cover, remove the 4 element cover screws. Carefully remove this top cover noting the position of
the element and the neoprene side pad. Lift out the element for soldering and fittings. Both ends are sized to accept
1/2'' solder fittings. (Note required fittings for one pipe and two pipe systems on page 6).
8. Replace the heating element in the bottom cover in the proper position. Place the neoprene side pad in position and
replace the top cover using the 4 screws. Tighten enough to keep the element in place between the covers. DO NOT
OVER-TIGHTEN!
9. Place the TWIN-FLO III under the cabinet and connect the piping and wiring. Make sure unit & outlet are free of any
dirt or debris prior to start up. Turn on the system, purge of air, check blower operation and check for any possible
leaks in the piping (run for 2 hrs. minimum). It should then be screwed to the floor through the four resilient mounting
feet (2-inside electrical box and 2 external). Do not over-tighten screws. Secure top of electrical box.
Beacon/Morris
260 NORTH ELM STREET, WESTFIELD, MASSACHUSETTS 01085
7555 TRANMERE DRIVE, MISSISSAUGA, ONTARIO L5S 1L4 CANADA
www.beacon-morris.com
1.
TWIN-FLO III
TYPE K42
FIGURE A
12 3/4
(324)
ELECTRIC
CONNECTION
BOX
12 1/4
(311)
TWIN-FLO III
TYPE K84
FIGURE B
3 7/8
(98)
3 7/8
(98)
SWITCH
SWITCH
AQUASTAT
12 3/4
(324)
AQUASTAT
MA
X
O
F
F
11" (279) K42
ELECTRIC
CONNECTION
M
I
N
18"
(457)
HEATED
DISCHARGE
BOX
HEATED
DISCHARGE
RETURN
AIR
6 1/4 MIN.
(159)
6" PIPE
CENTERS
(152)
AIR
2" AIR
DISCHARGE
(51)
SUPPLY
RETURN
CAT-55110C
19 1/4
(489)
RETURN
AIR
6 1/4 MIN.
(159)
6" PIPE
CENTERS
(152)
AIR
2" AIR
DISCHARGE
(51)
SUPPLY
RETURN
CAT-55111C
TWIN-FLO III
TYPE K120
FIGURE C
Dimensions shown
in English and metric ( ).
3 7/8
(98)
SWITCH
12 3/4
(324)
AQUASTAT
ELECTRIC
CONNECTION
BOX
DISCHARGE
HEATED
AIR
23"
(584)
2.
RETURN
AIR
19 1/4
(489)
CAT-55112B
8 1/4 MIN.
2" PIPE
CENTERS
(51)
3 1/2 AIR
DISCHARGE
(210)
SUPPLY
RETURN
(89)
INSTALLATION OF TWIN-FLO III WALL MODELS - TYPE “W” AND TYPE “F”
SWITCH
SUPPLY
RETURN
WOLF R
I
A
CAT-55542A
W42 14 1/4 (362)
W84 21 1/4 (540)
W120 21 1/4 (540)
4" (102)
MIN.
22 1/8
(562)
W42 16" (406)
W84 23" (584)
W120 23" (584)
25"
(635)
ELECTRICAL
KNOCKOUT
Figures D and F show exploded views of the wall models”W” & “F” Twin-Flo III's. Figure E shows the “W” type
mounted in a wall with an air outlet at the top of the unit. Figure G shows the “F” type mounted. The louvers of
the front panel will direct the air flow as shown. Use the following procedures for installation:
Type W Installation
14" (356) W42
21" (533) W84
21" (533) W120
3
5
6
1W
22 3/32
(561)
25"
(635)
4"
(102)
2W
FIGURE E
6. FLANGED NUTS
7. KICKSPACE ELECTRICAL CONTROL
BOX COVER
8. WASHERS (PLASTIC)
9. SNAP-CAP (PLASTIC)
16" (406) W42
23" (584) W84
23" (584) W120
TYPE W
FIGURE D
PARTS LIST
7
1/2
(13)
9
8
4W
CAT-55524A
FIGURE D
1W. FRONT PANEL ASS'Y
2W. BACK RECESSED PANEL ASS'Y
3. KICKSPACE UNIT
4W. FRONT PANEL MTG. SCREWS
5. LOCKWASHERS
PART #3 (KICKSPACE UNIT) WILL BE SHIPPED IN IT'S OWN CARTON. ALL REMAINING PARTS ARE
INCLUDED IN A SEPERATE CARTON.
TYPE “W” :
1.) Frame an opening between wall studding as shown in
Figure E. Model W42 will fit between studs that are
on 16'' centers. Model 5/B W84 and K120 will require
a small amount of framing to suit the mounting. A 7/8''
diameter hole is provided at the bottom of the cabinet
interior to provide entrances for electrical connections,
and a 7/8'' diameter knockout is provided at the rear
of the motor in the electrical control box. A 2-1/2''
diameter hole is provided at the bottom of the cabinet
interior to provide an entrance for piping connections.
Cut horizonal framing to clear, as necessary.
2.) After removing the front panel mounting screws (Item
4W), remove the front louvered panel (Item 1W).
Notice the direction of the louvers (see the air flow
direction label on inside front label).
3.) Nail the recessed cabinet (Item 2W) to the framed
opening at both sides.
4.) Mount the Kickspace Unit (Item 3) to the recessed
back panel, remove the electrical control box cover
from kickspace unit. Secure the kickspace unit in
place using Items 5 & 6 as shown in Figure D. Do
not over tighten.
5.) Remove the heating element from the kickspace unit
(Item 3) following the procedure described in the
installation of Type “K”, step 6. Hold this element and
fittings temporarily in place in the recessed cabinet
before soldering to check for clearance and length of
tubing required.
6.) After piping connections have been made, return the
element to the cabinet as described in Type K
installation, step 8.
7.) Electrical connections for the wall units are to be
made as shown on page 5.
8.) Make final piping and electrical connections (see
pages 5 & 6) to the system in the cabinet. Secure in
place the kickspace electrical control box cover. Turn
on the system, purge of air, check blower operation,
and check for any possible leaks in the piping.
9.) Replace front panel (Item 1W), place washers (Items 8)
in required positions, screw through holes and tighten.
10.) Place snap-cap
®
(Item 9) over washer at angle. Push
snap-cap® (Item 9) DOWN firmly until it engages with
a snap.
3.
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