Install Instructions

BULLETIN MI2052-06/04
REPLACED MC2029
SERIES 94SERIES 94
SERIES 94SERIES 94
SERIES 94 INSTALLATION INSTRUCTIONS
and field service check list
Page 2 Specifications and Dimensions
Page 3 Installation of Components
Page 4 and 5 Field Service Checklist
Page 6 Preliminary Circuit Analysis
Page 6 Typical Gas Trains
Page 7 Wiring Diagrams
Page 8 Valve Adjustments
Table of Contents
(See bulletin MT 2035 for additional M/MR valve information)
Valves:Valves:
Valves:Valves:
Valves:
M411, M420, M420H, and M451 (3/8" and 1/2" pipe size)
M511, M520, M520H, and M551 (1/2" and 3/4" pipe size)
M611, M620, M620H, and M651 (3/4" and 1" pipe size)
MR212D (1", 1-1/4", and 1-1/2" pipe size)
MR212E (1-1/2" and 2" pipe size)
MR212G (2-1/2" and 3" pipe size)
MR212J (4" flanged)
MR212D-2, E-2, G-2, and J-2 (same pipe sizes as above, but
used for 2-speed blower or dual fuel operation).
MR251D, E, and G (same pipe sizes as above, but used for
positive pressure atmospheric burner applications).
Temperature Sensors:Temperature Sensors:
Temperature Sensors:Temperature Sensors:
Temperature Sensors:
TS194 (use with mixing tube)
TS394-3B48FQ (3" x .19" dia. probe)
Mixing Tubes: Mixing Tubes:
Mixing Tubes: Mixing Tubes:
Mixing Tubes: (length)
MT1-9 or 2-9 (9" / 229 mm)
MT1-12 or 2-12 (12" / 305 mm)
MT1-23 or 2-23 (23" / 584 mm)
MT1-28 or 2-28 (28" / 711 mm)
MT1-57 (57" / 1448 mm)
Common ItemsCommon Items
Common ItemsCommon Items
Common Items
Remote Temperature Selectors (with LED Display):Remote Temperature Selectors (with LED Display):
Remote Temperature Selectors (with LED Display):Remote Temperature Selectors (with LED Display):
Remote Temperature Selectors (with LED Display):
TD94E-0409 (40
o
to 90
o
F)
TD94E-0616 (60
o
to 160
o
F)
TD94E-1030 (100
o
to 300
o
F)
TD294E-609/0818 (dual temp 60
o
to 90
o
F and 80
o
to 180
o
F)
Amplifiers:Amplifiers:
Amplifiers:Amplifiers:
Amplifiers:
A1094 (all temperature ranges)
A1494 (all temperature ranges)
Override Stat (optional) - Override Stat (optional) -
Override Stat (optional) - Override Stat (optional) -
Override Stat (optional) - T115 (40
o
to 90
o
F)
(use with TD94E-0409)
Remote System ItemsRemote System Items
Remote System ItemsRemote System Items
Remote System Items
Self-contained System ItemsSelf-contained System Items
Self-contained System ItemsSelf-contained System Items
Self-contained System Items
AmplifierAmplifier
AmplifierAmplifier
Amplifier
/Selectors (with LCD Display):/Selectors (with LCD Display):
/Selectors (with LCD Display):/Selectors (with LCD Display):
/Selectors (with LCD Display):
AD1094C-1050 (100
o
to 500
o
F)
AD1094C-2565 (250
o
to 650
o
F)
AD1094CM-1234 (120
o
to 345
o
C)
AD1494CK-60120 (600
o
to 1200
o
F)
System Components
Note: Note:
Note: Note:
Note: The M (modulator) valve requires a pressure regulator for high fire setting.
The MR (modulator/regulator) valve requires no pressure regulator up to 5 psi.
selector TD94E-0409. The self-contained system has the
amplifier/selector combined as a single unit. Common items
include temperature sensors, mixing tubes, and modulator/
modulator-regulator valves.
The TD294E is a dual remote temperature selector used
primarily for paint booth "spray/dry" applications. Both the
TD294E and TD94E have LED digital readouts. A "K"
thermocouple (not supplied by Maxitrol) may be used with "K"
suffixed amplifier/selectors.
The Selectra SERIES 94 is for use with
either direct or indirecteither direct or indirect
either direct or indirecteither direct or indirect
either direct or indirect
gas fired unitsgas fired units
gas fired unitsgas fired units
gas fired units (furnaces, ovens, etc.). The system may be field
installed on existing equipment or specified for new equipment
installation.
This bulletin's information is often presented in terms of
'remote' or 'self-contained' system items, along with
components common to either configuration. A remote system
contains an amplifier with a separate temperature selector. A
room override thermostat is optional with remote single dial
Introduction