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MENU
PROGRAM
PROGRAM
LOOP 2
LOOP 2
OFFSET
THROT RNG
HEAT/COOL
SETBACK
EXIT
Fig. 70. Program - Setpoint Offset (Loop 2 only).
°F
220
SP MAX A1
210
(BOILER MAX)
S
200
E
N
190
S
O
180
R
A
170
160
SP MIN A2
(BOILER MIN)
150
140
10
RESET B1
(OUTSD MIN)
Fig. 71. Reset Curve with Offset for Loop 2.
PROGRAM
RELAY 9
Fig. 72. Program Menus for Relays.
T775L SERIES 2000 ELECTRONIC STAND-ALONE STAGING CONTROLLER
MENU
PROGRAM
LOOP 2
OFFSET
-10
o
ENTER
SETPOINT
OFFSET
FOR
LOOP 2
M24410
LOOP 1
SETPOINT
LOOP 2
SETPOINT
OFFSET
-10°F
20
70
30
40
50
60
80
RESET B2
(OUTSD MAX)
SENSOR B
MENU
PROGRAM
RELAY 9
OFFSETDIFFRNTL
DIFFERENTIAL
SENSOR
HEAT/COOL
SETBACK
EXIT
3.4. Loop 2
For the second loop (if it is configured for Reset), the
Offset parameter displays on the Program menu as
shown in Fig. 70.
3.4.1. SETPOINT OFFSET
F
This value is the number of degrees plus (+) or minus (-)
that you want the temperature to be offset from the Loop 1
setpoint. See Fig. 71. For example, If you want the Loop 2
setpoint to be 10°F less than the Loop 1 setpoint, enter
-10°F.
1. From the menu, use the and buttons to
highlight OFFSET.
2. Press the button to display the value.
3. Use the and buttons to increase/decrease the
desired temperature.
OFFSET Default: 0°F
OFFSET Range: -150°F to 150°F (-101°C to 66°C)
4. Press the button to accept the value and display
the next option.
3.4.2. Loop 2 Programming
To complete the programming of Loop 2, perform the
procedures in "3.3.5. THROTTLING RANGE" through
"3.3.7. SETBACK OFFSET (if configured)" beginning on
page 28.
3.4.3. Exit Loop Programming with
Reset
When you finish programming the loop(s), press the
°F
HOME button to leave programming mode and return to
the home screen.
M24403
If you have additional relays configured, continue with
"3.5. Program Menus for the Additional Relays with
Reset" on page 29.
If there are no additional relays, continue with "3.7. Exit
Programming with Reset" on page 31.
3.5. Program Menus for the Additional
Relays with Reset
Press the MENU button, select PROGRAM, then select
an available relay to view the parameters. Fig. 72 shows
the example for relay 9. If Relays are not set for Reset in
Setup mode, simply enter the setpoint desired.
Up to two additional two relays can be available for
independent on-off control. Examples of Loop and Relay
configurations are:
• Number of relays = 8. Loop 1 uses relays 1-3,
M24414
and Loop 2 uses relays 3-6. The remaining two
relays (7 and 8) are available for use.
• Number of relays = 11. Loop 1 uses relays 1-5,
and Loop 2 uses relays 6-10. The remaining
relay (11) is available for use.
• Number of relays = 12. Loop 1 uses relays 1-4,
and Loop 2 uses relays 5-8. Relays 9 and 10
are available for use, but in this case, relays 11
and 12 are not usable.
29
(Loop 2 only)
62-0257—11
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