Morning Warmup and Daytime Warmup are two critical procedures carried out by the commissioning agent to ensure that the mechanical systems of a facility are functioning optimally throughout the day.
| Mode | Step 1 | Step 2 | Step 3 | Step 4 |
|---|---|---|---|---|
| MWU |
Set values as follow (all must be in service) MO/7 = 2-unoccupied MO/8 = 1-Auto AO/11 Out of Service = INACTIVE (put it in service) AO/11 = 60 deg. F (must be less than AO/4 - 1.5 deg. F) wait for: MI/19 = 13-Max Heat MI/20 = 2-Unoccupied |
Set present values as follow MO/7 = 1-occupied Upon Unocc. to occ. transition, the unit will be allowed to heat (assuming AI/15 is less than AO/4 minus 1.5 deg. F) IF MI/19 = 13-Max Heat for < 6 minutes Fan 1% for 6 minutes total (intended to allow VAV boxes to ramp up) 100% after 6 minutes Heat 2-minute delay (once fan = 100%), then Heat will fire MI/19 = 13-Max Heat for > 6 minutes Fan The fan will ramp to 100% right away Heat 2-minute delay (once fan = 100%), then Heat will fire |
MWU will terminate after 1 hour or once AO/11 > AO/4 Remember AO/11 requires a heartbeat/value written at least every 15 minutes |
Release overrides to MO/7 MO/8 AO/11 Revert AO/11 Out of Service to the correct setting for your application - Local sensor; AO/11 Out of Service - Communicated value; In Service |
| DWU |
Set present values as follow: MO/7 = 1-occupied MO/8 = 1-Auto AO/2 = 72.5 Deg. F AO/11 Out of Service = INACTIVE (put it in service) wait for MI/19 = 1-Auto (may instantly show *13-Max heat if space temp is below DWU Initiate) MI/20 = 1-Unoccupied |
AO/11 = 60 deg. F AO/2 = 75 deg. F *AO/11 must be < AO/43 must be less than < AO/5 must be less than < AO/2 minus AO/29
IF MI/19 = 13-Max Heat for < 6 minutes Fan 1% for 6 minutes total (intended to allow VAV boxes to ramp up) 100% after 6 minutes Heat 2 minute delay (once fan = 100%), then Heat will fire MI/19 = 13-Max Heat for > 6 minutes Fan Fan will ramp to 100% right away Heat 2 minute delay (once fan = 100%), then Heat will fire |
DWU will terminate automatically - once AO/11 > AO/5 Remember AO/11 requires a heartbeat/value written at least every 15 minutes |
Release overrides to MO/7 MO/8 AO/2 AO/11 Revert AO/11 Out of Service to correct setting for your application - Local sensor; AO/11 Out of Service - Communicated value; In Service For this to work in normal operation remember *AO/43 must be less than < AO/5 must be less than < AO/2 minus AO/29 |
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.