FORM 046.201 REV
1
8
04
THERMA-FUSER™
THERMALLY POWERED VAV DIFFUSER
INSTALLATION, OPERATION & MAINTENANCE
VARIABLE AIR VOLUME SYSTEMS OPTIMIZED
Continued on next page
Copyright © Acutherm 2009
Models: STR-C VAV cooling only.
STR-HC VAV cooling and VAV heating.
(see Fig. 1 for dimensions.)
TABLE OF CONTENTS
INSTALLATION INSTRUCTIONS ........................ 1
OPENING THE APPEARANCE PANEL............... 2
SYSTEM BALANCING ......................................... 2
ADJUSTING MINIMUM FLOW ............................. 3
ADJUSTING TEMPERATURE SETPOINTS ........ 3
MAINTENANCE .................................................... 3
CONTROLLING THE SYSTEM ............................ 3
TROUBLESHOOTING .......................................... 4
10 YEAR WARRANTY.......................................... 6
DAMAGED FREIGHT CLAIM PROCEDURE
When the diffusers are received, inspect for damage
which may have occurred during shipment. If damage
is evident, it should be noted on the carrier's freight bill.
A written request for inspection by the carrier's agent
should be made at once.
STORAGE
Cartons should always be stacked on end with the
arrows on the cartons pointing up. Do not stack cartons
flat on the sides. Excessive weight may cause damage
to the diffusers.
Do not store for prolonged times at temperatures
exceeding 130°F/56°C.
IDENTIFICATION
Diffusers are factory shipped one per carton. The
model designation is on the diffuser and on the carton.
INSTALLATION PRECAUTIONS
When installing diffusers, make sure construction
debris does not enter the diffuser or duct system.
Because the models STR-C and STR-HC control room
temperature by sensing the room air induced up the
center of the room, care should be taken not to disturb
room air induction and entrainment. For example,
location next to walls or dropped lights results in the
reflection of primary air back at the Therma-Fuser
diffuser and should be avoided. Either the light or the
Therma-Fuser diffuser should be relocated.
Fig 1. Dimensions
OD
Inlet
Desig-
nation
Inches
±
1
/
16
mm
±3
6
5
15
/
16
150
8
7
15
/
16
200
10
9
15
/
16
250
12
11
15
/
16
300
INSTALLATION INSTRUCTIONS
1.
Inspect the carton for damage before opening.
Notify carrier if external damage exists. Submit all
claims for shipping damage to the carrier.
2.
Move diffusers (in cartons) to installation area. Note
unit identification.
3.
Remove cardboard box and cardboard insert.
Discard packing material.
4.
Attach the neck of the diffuser to the duct by
screwing through the duct into the diffuser. A
minimum of four (4) screws is recommended. Use
wire hangers where required by code.
Note: Air Lifter, if used, must be installed before
attaching the diffuser to the duct.
5.
Flexible duct should NOT be formed in a centerline
radius of less than 1½ times the duct diameter.
6.
Do NOT reset the temperature set point on the
STR-C and STR-HC models until the space is
occupied. The set point is factory preset for
average conditions (74°F/23°C).
7.
Balance the system. See System Balancing.
8.
After the air conditioning system is started and after
the space is occupied, where necessary adjust the
temperature set point on STR-C and STR-HC
models to suit the occupant. See Adjusting
Temperature.
FLAT FRAME
BEVEL FRAME
27 3/8" - 695mm
