[Equest-users] [equest-users]

[Tim Dion]

One item that can cause this error notice on VAV systems is if you have not selected zone coils. Also, you need to watch your values for Zone Entering Max Supply Temp, Reheat Delta T, and Hot Deck Max Leaving Temp to ensure they are reasonable.

________________________________
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of W. Peter Anderson
Sent: Thursday, June 25, 2009 7:00 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] [equest-users]

Greetings-
I have set up PVAV systems with hot water coils.  I am getting error messages (See Below) for each of my systems.  On the LS-S reports, heating capacity for unit and zones is zero, but I do have hot water coils and a boiler loop, etc.

See below,
Thansk,
W. Peter Anderson, P.E
JP Engineering
41 Mechanic Street
Windsor, CT 06095
Ph: 860/688-5223
Fax: 860/688-5269



**WARNING**********************************************************************

ZONE EL1 NE Perim Zn (G.NE2)

might have insufficient heating capability.

Check that the SYSTEM or ZONE HEATING-CAPACITY plus this

ZONEs BASEBOARD-RATING is adequate to maintain the ZONE

specified DESIGN-HEAT-T for the calculated peak ZONE load

(see LS-A or LS-B for the ZONE peak load.)

SYSTEM HVAC-1

which supplies the above listed ZONE, has a design heating

coil exit temperature, HEAT-SET-T,(plus any zone reheat)

below its MAX-SUPPLY-T or the ZONE DESIGN-HEAT-T, which

might account for the insufficient heating capability.

**WARNING**********************************************************************

ZONE EL4 East Perim Zn (G.E2)

might have insufficient heating capability.

Check that the SYSTEM or ZONE HEATING-CAPACITY plus this

ZONEs BASEBOARD-RATING is adequate to maintain the ZONE

specified DESIGN-HEAT-T for the calculated peak ZONE load

(see LS-A or LS-B for the ZONE peak load.)

SYSTEM HVAC-1

which supplies the above listed ZONE, has a design heating

coil exit temperature, HEAT-SET-T,(plus any zone reheat)

below its MAX-SUPPLY-T or the ZONE DESIGN-HEAT-T, which

might account for the insufficient heating capability.

**WARNING**********************************************************************

PREHEAT/HEATING-CAPACITY in SYSTEM HVAC-1

is too low to provide the requested supply temperature for

the calculated mixed air temperature using total ZONE loads

(on LS-A/B) and SYSTEM design parameters, plus outside air

conditions (on LS-C), and specified capacities & air flows.

Requested temperature is 55.00 calculated is -3.14

Check HEATING-CAPACITY, HEAT-SET-T, PRE-HEAT-T, MAX-SUPPLY-T,

DESIGN-HEAT-T, and ZONE loads for consistency.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20090625/15b1780f/attachment.htm>