Installation and Operation Manual
●
Fan Coil Controller – EZstat
EC-EZstat
Date: 9-2014
Supersedes: NEW
Engineered Comfort reserves the right to change any information concerning product or specification without notice or obligation.
Page 24 of 36
Procedure
Steps
Display
Set Mod Fan
Action
From the SYSTEM menu choose MOD FAN and then choose one of
the following motor types:
•
STEP (3‑speed only)
•
MODULATE (default – ECM only)
Enter
MOD FAN ACTION
STEP
MODULATE
Set Auto Fan
Reset
From the SYSTEM menu choose AUTO FAN RESET for ECM
applications only.
To adjust default time of 60 mins, select LOCAL OVRD TIME. This
function protects from user accidentally changing out Auto Mode on
interface. The control will reset back to Auto Mode, while ensuring
the efficiency benefits of the variable speed motor.
Enter
AUTO FAN RESET
ENABLE
DISABLE
Set Stage 1 Fan
(two pipe only)
From the SYSTEM menu choose Stage 1 fan.
Select the fan % for Stage 1.
Enter
STAGE 1 FAN:
50%
Set Stage 2 Fan
(two pipe only)
From the SYSTEM menu choose Stage 2 fan.
Select the fan % for Stage 2.
Enter
STAGE 2 FAN:
100%
Set the valve
action
Select one of the valve actions from the SYSTEM menu.
•
VLV ACTION (two pipe only)
•
CL VALVE ACTION (four pipe only)
•
HT VLV ACTION (four pipe only)
• MAX VLV LOW
• MAX VLV MED
• MAX VLV HIGH
Not all choices apply to every application.
Four Pipe View
Four Pipe View
Valve action selections:
• NORMAL OPEN
– The valve changes from fully open to fully
closed as the EZstat varies the valve output from 0 to 10 volts
• NORMAL CLOSED
– The valve changes from fully closed to fully
open as the EZstat varies the valve output from 0 to 10 volts.
Two Pipe View
•
MAX VLV LOW (two pipe only) – Select % valve, opens for low
fan speed
Enter
MAX VLV LOW:
100%
•
MAX VLV MED (two pipe only) – Select % valve, opens for
medium fan speed
Enter
MAX VLV MED:
100%
•
MAX VLV HIGH (two pipe only) – Select % valve, opens for high
fan speed
Enter
MAX VLV HIGH:
100%
NOTE
