Set Up & Load Definition - IBC VFC 15-150 Manual

2.7
2-10
VFC 15-150 - VFC 45-225 MODULATING GAS BOILERS
outdoor reset enabled load once the outdoor temperature reaches a threshold
level e.g. 60°F. the load will be automatically reactivated once the weather
returns to levels below the selected threshold. use of this feature with a value 5°
- 10°F below the Indoor Setpoint Temperature is strongly recommended to avoid
short cycling of the boiler during very marginal heating conditions.
From the main installer setup Menu, select "Heat Load Configuration", then
"Configure Load (use the load number tagged as Space Heating)", and drop
down to "summer shutdown". Press enter to select, then use the keys to move
the threshold temperature to the desired level, and press the centre key again to
record. the controller must receive a valid signal from the tekmar 070 outdoor
sensor, supplied with the boiler, to operate.
2.6.8 Remote / Slave Mode
installers have the option of placing the control of the boiler under an external
electronic controller (such as a tekmar 265). Connections are provided to
receive a 0-10vdC or 4-20 ma signal for throttle management. the default
configuration is 0-10V; to switch over to 4-20mA, remove the electrical box
corner cover to provide access to the slotted clearance hole on the lower right
corner of the control module; use needle-nose pliers to move the plastic jumper
tab from the right two terminals to the left two terminals accessible through
the slotted clearance hole. Where the iBC controller senses a signal on the
remote connections, it automatically subordinates its internal throttle logic, and
adopts the external signal. in such slave mode, temperature management is
also surrendered to the external controller's sensors. the installer only enters
Maximum Boiler supply and on/off differential temperatures; the boiler will
respond to these as high limit switches.
From the main installer setup Menu, select "Define Load (with desired #)", then
locate and enter "External Control". Next, configure the load with the Maximum
and differential temperature values.
set uP & load deFinition
after the boiler is powered up, the installer can use the keypad and display to
characterize the application, as follows:
in the Standby mode, start by pressing any key to call up the Main Menu.
1.
2. using the directional keys, move the cursor to Installer Setup, then depress
the centre (Enter) key. see Section 2.4.5. Passwords if these are in use or
desired.
3. select Date & Time (and enter), then move the cursor about to adjust time
(on a 24:00 hour basis), date and invoke daylight savings if appropriate. use
the upper key to increase a value (e.g. date, time, temperature), the bottom
key to reduce. note that it is often possible to move in steps of 10 or 100 by
moving the cursor right or left once a field has been selected for adjustment.
Hit the Enter key to record the desired / amended information after each
value has been selected.
use the left-most key to step back to the Installer Setup screen, and select
4.
Heat Load Configuration for input of the load characteristics.
INSTALLATION AND OPERATION INSTRUCTIONS